Update secret name

.gitea/workflows/build-container-image.yml

@@ -40,7 +40,7 @@ jobs:
           username: ${{ gitea.actor }}
           # Use a Personal Access Token (PAT) stored as a Gitea Action secret
           # You MUST create a GITEA_TOKEN secret with 'write:packages' scope.
-          password: ${{ secrets.GITEA_TOKEN }}
+          password: ${{ secrets.BUILD_TOKEN }}
 
       # Define image tags based on branch/tag information
       - name: Determine Image Tags