Fix CI: replace actions/create-release@v1 with softprops/action-gh-release@v2

actions/create-release@v1 fails with 422 'already_exists' if the release
for the tag was already created (e.g. re-pushed tag or prior run).
softprops/action-gh-release@v2 upserts — creates or updates the existing
release, making the release job idempotent.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: vkuttyp

.github/workflows/release.yml

@@ -178,12 +178,10 @@ jobs:
           echo "EOF" >> "$GITHUB_OUTPUT"
 
       - name: Create GitHub Release
-        uses: actions/create-release@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        uses: softprops/action-gh-release@v2
         with:
-          tag_name:    ${{ steps.version.outputs.tag }}
-          release_name: CosmoSQLClient ${{ steps.version.outputs.tag }}
-          body:        ${{ steps.changelog.outputs.body }}
-          draft:       false
-          prerelease:  ${{ steps.version.outputs.prerelease }}
+          tag_name:   ${{ steps.version.outputs.tag }}
+          name:       CosmoSQLClient ${{ steps.version.outputs.tag }}
+          body:       ${{ steps.changelog.outputs.body }}
+          draft:      false
+          prerelease: ${{ steps.version.outputs.prerelease }}