Adjust GitHub workflow config

Author: andrei-punko

.github/workflows/gradle.yml

@@ -1,29 +1,25 @@
 name: Java CI with Gradle
 on:
   push:
-    branches: [ "master" ]
+    branches: [ master ]
   pull_request:
-    branches: [ "master" ]
+    branches: [ master ]
+  workflow_dispatch:
 
 jobs:
   build:
     runs-on: ubuntu-latest
-    permissions:
-      contents: read
 
     steps:
-    - uses: actions/checkout@v4
-    - name: Set up JDK 21
-      uses: actions/setup-java@v4
-      with:
-        java-version: 21
-        distribution: temurin
-        cache: gradle
+      - name: Checkout sources
+        uses: actions/checkout@v4
 
-    # Configure Gradle for optimal use in GitHub Actions, including caching of downloaded dependencies.
-    # See: https://github.com/gradle/actions/blob/main/setup-gradle/README.md
-    - name: Setup Gradle
-      uses: gradle/actions/setup-gradle@af1da67850ed9a4cedd57bfd976089dd991e2582 # v4.0.0
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: 21
+          distribution: temurin
+          cache: gradle
 
-    - name: Build with Gradle Wrapper
-      run: ./gradlew build
+      - name: Build with Gradle Wrapper
+        run: ./gradlew build