Update workflows.yml

.github/workflows/workflows.yml

@@ -9,7 +9,7 @@ steps:
 uses: docker/login-action@v1
 with:
 registry: ghcr.io
-username: jarochi
+username: ${{ github.actor }}
 - name: Build the test-docker Docker image
 run: |
        docker build . --tag ghcr.io/BioGenies/imputomics:docker_test