[release] Fix EOF delimiter and test with NuGet API key

Author: byerlikaya

.github/workflows/ci.yml

@@ -187,7 +187,7 @@ jobs:
         echo "" >> $GITHUB_OUTPUT
         echo "### ⭐ Support the Project" >> $GITHUB_OUTPUT
         echo "If you find SmartWhere useful, please consider giving it a star on GitHub!" >> $GITHUB_OUTPUT
-        echo "EOF"
+        echo "EOF" >> $GITHUB_OUTPUT
 
     - name: Create Release
       uses: actions/create-release@v1