fix: revert login method

.forgejo/workflows/build.yaml

@@ -9,6 +9,13 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
+      - name: Login to git.kakio.us
+        uses: docker/login-action@v3.3.0
+        with:
+          registry: git.kakio.us
+          username: kakious
+          password: ${{ secrets.REPO_PUSH  }}
+
       - name: Build and push
         uses: docker/build-push-action@v2
         with:
@@ -16,8 +23,6 @@ jobs:
           file: ./Dockerfile
           platforms: linux/amd64,linux/arm64
           push: true
-          secrets: |
-            GIT_AUTH_TOKEN=${{ secrets.REPO_PUSH }}
           tags: |
             git.kakio.us/kakious/fibermonitor:latest
             git.kakio.us/kakious/fibermonitor:${{ github.sha }}