chore: bump GitGuardian/ggshield-action from 1.21.0 to 1.22.0 (#77)

Bumps [GitGuardian/ggshield-action](https://github.com/gitguardian/ggshield-action) from 1.21.0 to 1.22.0.
- [Release notes](https://github.com/gitguardian/ggshield-action/releases)
- [Commits](GitGuardian/ggshield-action@5a76f0f...9074c08)

---
updated-dependencies:
- dependency-name: GitGuardian/ggshield-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/git-guardian.yml

@@ -18,7 +18,7 @@ jobs:
         with:
           fetch-depth: 0 # fetch all history so multiple commits can be scanned
       - name: GitGuardian scan
-        uses: GitGuardian/ggshield-action@5a76f0fb3013bab9d8fbf749309a7b6408b3ec90 # v1.21.0
+        uses: GitGuardian/ggshield-action@9074c0893e8ee86ccd6418177a0eb3e5aa02262a # v1.22.0
         env:
           GITHUB_PUSH_BEFORE_SHA: ${{ github.event.before }}
           GITHUB_PUSH_BASE_SHA: ${{ github.event.base }}