[ci]Bump check-spelling/check-spelling from 0.0.20.pre.alpha7 to 0.0.20 (#19610)

Bumps [check-spelling/check-spelling](https://github.com/check-spelling/check-spelling) from 0.0.20.pre.alpha7 to 0.0.20.
- [Release notes](https://github.com/check-spelling/check-spelling/releases)
- [Commits](https://github.com/check-spelling/check-spelling/compare/v0.0.20-alpha7...v0.0.20)

---
updated-dependencies:
- dependency-name: check-spelling/check-spelling
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

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

.github/workflows/spelling2.yml

@@ -24,7 +24,7 @@ jobs:
     steps:
     - name: check-spelling
       id: spelling
-      uses: check-spelling/check-spelling@v0.0.20-alpha7
+      uses: check-spelling/check-spelling@v0.0.20
       with:
         config: .github/actions/spell-check
         suppress_push_for_open_pull_request: 1
@@ -46,7 +46,7 @@ jobs:
     if: (success() || failure()) && needs.spelling.outputs.followup
     steps:
     - name: comment
-      uses: check-spelling/check-spelling@v0.0.20-alpha7
+      uses: check-spelling/check-spelling@v0.0.20
       with:
         config: .github/actions/spell-check
         checkout: true