fix: use context var instead of hardcoding

.github/workflows/ci.yaml

@@ -81,7 +81,7 @@ jobs:
       - name: Docker Build
         uses: docker/build-push-action@v2
         with:
-          tags: todogroup/repolinter:latest
+          tags: ${{ github.repository }}:latest
           load: true
           cache-from: type=local,src=/tmp/.buildx-cache
           cache-to: type=local,dest=/tmp/.buildx-cache