fix: docker image tags

Author: soulteary

.github/workflows/release.yml

@@ -29,7 +29,6 @@ jobs:
           ghcr.io/soulteary/cronicle
         tags: |
           type=schedule
-          type=ref,event=latest
           type=ref,event=branch
           type=ref,event=pr
           type=semver,pattern={{version}}