Update README

.github/workflows/ci.yml

@@ -98,7 +98,7 @@ jobs:
         with:
           images: ${{ env.DOCKER_IMAGE }}
           tag-sha: true
-          tag-match: \\d{1,3}.\\d{1,3}.\\d{1,3}
+          tag-match: '\d{1,3}.\d{1,3}.\d{1,3}'
       -
         name: Set up QEMU
         uses: docker/setup-qemu-action@v1