Make the llama-ui version range more strict (#164)

* fix: pin @llamaindex/ui to ~3.6.1 to avoid breaking changes in minors

Changed from ^x.y.z (caret) to ~3.6.1 (tilde) versioning for
@llamaindex/ui dependency across all template UI packages to prevent
breaking changes from minor version bumps.

* chore: bump template versions for @llamaindex/ui update

Incremented patch versions for all templates with updated UI dependency:
- basic-ui: 0.2.4 → 0.2.5
- classify-extract-sec: 0.2.6 → 0.2.7
- data-extraction: 0.3.7 → 0.3.8
- document-qa: 0.2.6 → 0.2.7
- extract-basic: 0.1.6 → 0.1.7
- extract-reconcile-invoice: 0.3.2 → 0.3.3
- showcase: 0.3.1 → 0.3.2

* fix: revert document-qa and basic-ui to @llamaindex/ui ^2.1.1

These templates still use v2 of the UI package, so keeping them on their
original caret range and reverting their version bumps.

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Co-authored-by: Claude <noreply@anthropic.com>

ui/package.json

@@ -22,7 +22,7 @@
     "react-router-dom": "^7.8.0"
   },
   "devDependencies": {
-    "@llamaindex/ui": "^3.2.0",
+    "@llamaindex/ui": "~3.6.1",
     "@tailwindcss/postcss": "^4",
     "@tailwindcss/typography": "^0.5.16",
     "@types/canvas-confetti": "^1.9.0",