ci: rename Bumpy Check job to bump-files to avoid status-context collision

The #142 squash-merge dropped this rename. On main, the "Bumpy Check"
workflow's job is named `check`, which collides with the `check` job in
ci.yaml — two workflows emit the same `check` status context, making the
required-check match ambiguous.

Rename it to `bump-files` so the bump-file check has its own distinct status
context. The branch-protection ruleset should require `check` (CI tests) +
`bump-files`, replacing the now-defunct `check-local` (the old
pull_request_target job, removed in #142).

Author: theoephraim

.github/workflows/bumpy-check.yaml

@@ -18,7 +18,9 @@ permissions:
   contents: read
 
 jobs:
-  check:
+  # Distinct job name (not "check") so its status context doesn't collide with the
+  # `check` job in ci.yaml. This is the context to require in branch protection.
+  bump-files:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7