Python: Bump Python project version to 1.2.0 for a release. (#7177)

### Motivation and Context

Bump Python project version to 1.2.0 for a release.

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### Description

Bump Python project version to 1.2.0 for a release.

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### Contribution Checklist

<!-- Before submitting this PR, please make sure: -->

- [X] The code builds clean without any errors or warnings
- [X] The PR follows the [SK Contribution
Guidelines](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
and the [pre-submission formatting
script](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md#development-scripts)
raises no violations
- [X] All unit tests pass, and I have added new tests where possible
- [X] I didn't break anyone 😄

python/pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "semantic-kernel"
-version = "1.1.2"
+version = "1.2.0"
 description = "Semantic Kernel Python SDK"
 authors = ["Microsoft <[email protected]>"]
 readme = "pip/README.md"

python/samples/getting_started/00-getting-started.ipynb

@@ -17,7 +17,7 @@
    "outputs": [],
    "source": [
     "# Note: if using a Poetry virtual environment, do not run this cell\n",
-    "%pip install semantic-kernel==1.1.2"
+    "%pip install semantic-kernel==1.2.0"
    ]
   },
   {

python/samples/getting_started/01-basic-loading-the-kernel.ipynb

@@ -24,7 +24,7 @@
    "outputs": [],
    "source": [
     "# Note: if using a Poetry virtual environment, do not run this cell\n",
-    "%pip install semantic-kernel==1.1.2"
+    "%pip install semantic-kernel==1.2.0"
    ]
   },
   {

python/samples/getting_started/02-running-prompts-from-file.ipynb

@@ -35,7 +35,7 @@
    "outputs": [],
    "source": [
     "# Note: if using a Poetry virtual environment, do not run this cell\n",
-    "%pip install semantic-kernel==1.1.2"
+    "%pip install semantic-kernel==1.2.0"
    ]
   },
   {

python/samples/getting_started/03-prompt-function-inline.ipynb

@@ -25,7 +25,7 @@
    "outputs": [],
    "source": [
     "# Note: if using a Poetry virtual environment, do not run this cell\n",
-    "%pip install semantic-kernel==1.1.2"
+    "%pip install semantic-kernel==1.2.0"
    ]
   },
   {

python/samples/getting_started/04-kernel-arguments-chat.ipynb

@@ -27,7 +27,7 @@
    "outputs": [],
    "source": [
     "# Note: if using a Poetry virtual environment, do not run this cell\n",
-    "%pip install semantic-kernel==1.1.2"
+    "%pip install semantic-kernel==1.2.0"
    ]
   },
   {

python/samples/getting_started/05-using-the-planner.ipynb

@@ -32,7 +32,7 @@
    "outputs": [],
    "source": [
     "# Note: if using a Poetry virtual environment, do not run this cell\n",
-    "%pip install semantic-kernel==1.1.2"
+    "%pip install semantic-kernel==1.2.0"
    ]
   },
   {

python/samples/getting_started/06-memory-and-embeddings.ipynb

@@ -37,7 +37,7 @@
    "outputs": [],
    "source": [
     "# Note: if using a Poetry virtual environment, do not run this cell\n",
-    "%pip install semantic-kernel==1.1.2\n",
+    "%pip install semantic-kernel==1.2.0\n",
     "%pip install azure-core==1.30.1\n",
     "%pip install azure-search-documents==11.6.0b4"
    ]

python/samples/getting_started/07-hugging-face-for-plugins.ipynb

@@ -21,7 +21,7 @@
    "outputs": [],
    "source": [
     "# Note: if using a Poetry virtual environment, do not run this cell\n",
-    "%pip install semantic-kernel[hugging_face]==1.1.2"
+    "%pip install semantic-kernel[hugging_face]==1.2.0"
    ]
   },
   {

python/samples/getting_started/08-native-function-inline.ipynb

@@ -55,7 +55,7 @@
    "outputs": [],
    "source": [
     "# Note: if using a Poetry virtual environment, do not run this cell\n",
-    "%pip install semantic-kernel==1.1.2"
+    "%pip install semantic-kernel==1.2.0"
    ]
   },
   {

python/samples/getting_started/09-groundedness-checking.ipynb

@@ -36,7 +36,7 @@
    "outputs": [],
    "source": [
     "# Note: if using a Poetry virtual environment, do not run this cell\n",
-    "%pip install semantic-kernel==1.1.2"
+    "%pip install semantic-kernel==1.2.0"
    ]
   },
   {

python/samples/getting_started/10-multiple-results-per-prompt.ipynb

@@ -34,7 +34,7 @@
    "outputs": [],
    "source": [
     "# Note: if using a Poetry virtual environment, do not run this cell\n",
-    "%pip install semantic-kernel==1.1.2"
+    "%pip install semantic-kernel==1.2.0"
    ]
   },
   {

python/samples/getting_started/11-streaming-completions.ipynb

@@ -27,7 +27,7 @@
    "outputs": [],
    "source": [
     "# Note: if using a Poetry virtual environment, do not run this cell\n",
-    "%pip install semantic-kernel==1.1.2"
+    "%pip install semantic-kernel==1.2.0"
    ]
   },
   {

python/samples/getting_started/third_party/weaviate-persistent-memory.ipynb

@@ -156,7 +156,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "%pip install semantic-kernel[weaviate]==1.1.2"
+    "%pip install semantic-kernel[weaviate]==1.2.0"
    ]
   },
   {