Fix ci (#1354)

/cherry-pick

Signed-off-by: Tamal Saha <tamal@appscode.com>
Co-authored-by: Tamal Saha <tamal@appscode.com>

Author: 1gtm

.github/workflows/ci.yml

@@ -38,5 +38,5 @@ jobs:
           DOCKER_TOKEN: ${{ secrets.LGTM_GITHUB_TOKEN }}
           USERNAME: 1gtm
         run: |
-          docker login --username ${USERNAME} --password ${DOCKER_TOKEN}
+          docker login ghcr.io --username ${USERNAME} --password ${DOCKER_TOKEN}
           make push