Update actions and fix link

.gitea/workflows/build_push.yaml

@@ -11,17 +11,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository code
-        uses: https://github.com/actions/checkout@v3
+        uses: https://github.com/actions/checkout@v4
 
       - name: Log in to Gitea Docker Registry
-        uses: https://github.com/actions/docker/login-action@v1
+        uses: https://github.com/docker/login-action@v3
         with:
           registry: gitea.maximilian.link
           username: ${{ secrets.GITEA_USERNAME }}
           password: ${{ secrets.GITEA_PASSWORD }}
 
       - name: Build and push Docker image
-        uses: https://github.com/docker/build-push-action@v2
+        uses: https://github.com/docker/build-push-action@v5
         with:
             context: .
             push: true