remove tab

Author: Vladimir Kotal

.github/workflows/docker.yml

@@ -11,7 +11,7 @@ jobs:
     - name: Build Docker image
       env:
         DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
-	DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
+        DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
         OPENGROK_REPO_SLUG: ${{ github.repository }}
         OPENGROK_PULL_REQUEST: ${{ github.head_ref }}
         OPENGROK_REF: ${{ github.ref }}