ci: Fix typo in bump-version workflow

Author: ubolonton

.github/workflows/bump-version.yml

@@ -23,7 +23,7 @@ jobs:
             let commit = github.rest.git.getCommit({
               owner: context.repo.owner,
               repo: context.repo.repo,
-              sha: context.sha
+              commit_sha: context.sha
             });
             console.log(commit);
             let m = commit.message.match(/!bump-version(.*)$/m)