Bump streetsidesoftware/cspell-action from 7 to 8 (RustPython#6246)

Bumps [streetsidesoftware/cspell-action](https://github.com/streetsidesoftware/cspell-action) from 7 to 8.
- [Release notes](https://github.com/streetsidesoftware/cspell-action/releases)
- [Changelog](https://github.com/streetsidesoftware/cspell-action/blob/main/CHANGELOG.md)
- [Commits](streetsidesoftware/cspell-action@v7...v8)

---
updated-dependencies:
- dependency-name: streetsidesoftware/cspell-action
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -336,7 +336,7 @@ jobs:
       - 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@v7
+        uses: streetsidesoftware/cspell-action@v8
         with:
           files: '**/*.rs'
           incremental_files_only: true