Update secret name to FORGEJO_TOKEN

Change from GITEA_TOKEN to FORGEJO_TOKEN to match the
configured repository secret.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.forgejo/workflows/docker-build.yml

@@ -17,7 +17,10 @@ jobs:
           git checkout ${{ github.sha }}
 
       - name: Log in to Forgejo Container Registry
-        run: echo "${{ secrets.GITEA_TOKEN }}" | docker login forgejo.sivic.me -u ${{ github.actor }} --password-stdin
+        run: |
+          echo "Logging in as: ${{ github.actor }}"
+          echo "${{ secrets.FORGEJO_TOKEN }}" | docker login forgejo.sivic.me -u ${{ github.actor }} --password-stdin
+          echo "Login exit code: $?"
 
       - name: Build and push Docker images
         run: |