use actions with absolute URL

.gitea/workflows/build.yml

@@ -7,16 +7,16 @@ jobs:
 
     steps:
       - name: Checkout the code
-        uses: actions/checkout@v4
+        uses: https://github.com/actions/checkout@v4
 
       - name: Set up JDK 21
-        uses: actions/setup-java@v4
+        uses: https://github.com/actions/setup-java@v4
         with:
           distribution: 'temurin'
           java-version: '21'
 
       - name: Configure Maven CI/CD settings
-        uses: s4u/maven-settings-action@v3.0.0
+        uses: https://github.com/s4u/maven-settings-action@v3.0.0
         with:
           servers: |
             [{