Bump bobg/modver from 2.12.0 to 2.12.1

Bumps [bobg/modver](https://github.com/bobg/modver) from 2.12.0 to 2.12.1.
- [Release notes](https://github.com/bobg/modver/releases)
- [Commits](bobg/modver@f646e42...62db963)

---
updated-dependencies:
- dependency-name: bobg/modver
  dependency-version: 2.12.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/modver.yml

@@ -16,7 +16,7 @@ jobs:
         with:
           fetch-depth: 0
           persist-credentials: false
-      - uses: bobg/modver@f646e42936f006762d533d8dae3908cb7065adc9 # 2.12.0
+      - uses: bobg/modver@62db963a8c1d4c3725a1195bf65b6d957c087c9b # 2.12.1
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           pull_request_url: https://github.com/${{ github.repository }}/pull/${{ github.event.number }}