Bump streetsidesoftware/cspell-action from 2 to 6 in the github-actions group (RustPython#5646)

* Bump streetsidesoftware/cspell-action in the github-actions group

Bumps the github-actions group with 1 update: [streetsidesoftware/cspell-action](https://github.com/streetsidesoftware/cspell-action).


Updates `streetsidesoftware/cspell-action` from 2 to 6
- [Release notes](https://github.com/streetsidesoftware/cspell-action/releases)
- [Changelog](https://github.com/streetsidesoftware/cspell-action/blob/main/CHANGELOG.md)
- [Commits](streetsidesoftware/cspell-action@v2...v6)

---
updated-dependencies:
- dependency-name: streetsidesoftware/cspell-action
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

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

* Update .github/workflows/ci.yaml

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jeong, YunWon <69878+youknowone@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -313,8 +313,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - name: install extra dictionaries
+        run: npm install @cspell/dict-en_us @cspell/dict-cpp @cspell/dict-python @cspell/dict-rust @cspell/dict-win32 @cspell/dict-shell
       - name: spell checker
-        uses: streetsidesoftware/cspell-action@v2
+        uses: streetsidesoftware/cspell-action@v6
         with:
           files: '**/*.rs'
           incremental_files_only: true