(fix) codeql-analysis.yml removed deprecated steps

Removed deprecated `checkout HEAD^2` step from CodeQL workflow. 
https://docs.github.com/en/code-security/code-scanning/troubleshooting-code-scanning/unnecessary-step-found

.github/workflows/codeql-analysis.yml

@@ -30,16 +30,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
-      with:
-        # We must fetch at least the immediate parents so that if this is
-        # a pull request then we can checkout the head.
-        fetch-depth: 2
-
-    # If this run was triggered by a pull request event, then checkout
-    # the head of the pull request instead of the merge commit.
-    - run: git checkout HEAD^2
-      if: ${{ github.event_name == 'pull_request' }}
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL