Update action.yml for Build APK workflow

Author: DerGoogler

.github/actions/build-apk/action.yml

@@ -64,15 +64,14 @@ runs:
             echo ${{ inputs.keyStore }} | base64 --decode > ${{ github.workspace }}/key.jks
         fi
 
-    - name: Set up kez for private packages
+    - name: Set up credentials for private packages
       shell: bash
       run: |
-        if [ -n "${{ inputs.username }}" ]; then
-            {
-               echo gpr.user='${{ inputs.username }}'
-               echo gpr.key='${{ inputs.token }}' 
-            } >> gradle.properties
-        fi
+        [ -f gradle.properties ] && [ "$(tail -c1 gradle.properties)" != "" ] && echo >> gradle.properties
+        {
+          echo "gpr.user='${{ inputs.username }}'"
+          echo "gpr.key='${{ inputs.token }}'"
+        } >> gradle.properties
 
     - name: Set up JDK
       uses: actions/setup-java@v4