fix: improve EOF marker handling in release notes generation

Author: Toyota Yaris 2009

.github/workflows/build-and-release.yml

@@ -77,11 +77,13 @@ jobs:
           RELEASE_NOTES=$(git log --pretty=format:"* %s" $TAG_NAME)
         fi
         
-        echo "notes<<EOF" >> $GITHUB_OUTPUT
-        echo "## Changes in $TAG_NAME" >> $GITHUB_OUTPUT
-        echo "" >> $GITHUB_OUTPUT
-        echo "$RELEASE_NOTES" >> $GITHUB_OUTPUT
-        echo "EOF"
+        {
+          echo "notes<<EOF"
+          echo "## Changes in $TAG_NAME"
+          echo ""
+          echo "$RELEASE_NOTES"
+          echo "EOF"
+        } >> $GITHUB_OUTPUT
 
     - name: Create Release
       uses: softprops/action-gh-release@v1