デプロイ時に使用するSSHの鍵が無効になってる

[igrep]

https://app.circleci.com/pipelines/github/haskell-jp/blog/142/workflows/55d79579-8aa3-47d0-b14f-8899db902e42/jobs/961

ERROR: The key you are authenticating with has been marked as read only.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
make: *** [Makefile:72: deploy] Error 128

Exited with code exit status 2