build(deps): bump JuliaRegistries/TagBot from 1.20.2 to 1.21.1

Bumps [JuliaRegistries/TagBot](https://github.com/juliaregistries/tagbot) from 1.20.2 to 1.21.1.
- [Release notes](https://github.com/juliaregistries/tagbot/releases)
- [Commits](JuliaRegistries/TagBot@62dd7cd...79aed30)

---
updated-dependencies:
- dependency-name: JuliaRegistries/TagBot
  dependency-version: 1.21.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/TagBot.yml

@@ -25,7 +25,7 @@ jobs:
     if: github.event_name == 'workflow_dispatch' || github.actor == 'JuliaTagBot'
     runs-on: ubuntu-latest
     steps:
-      - uses: JuliaRegistries/TagBot@62dd7cd21dcde087eca10e70c3fc3f8cefbe44a2
+      - uses: JuliaRegistries/TagBot@79aed30d025666340f7407285d6e3e1a93535bde
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           # Edit the following line to reflect the actual name of the GitHub Secret containing your private key