Bump streetsidesoftware/cspell-action from 5 to 8 (#8218)

Bumps [streetsidesoftware/cspell-action](https://github.com/streetsidesoftware/cspell-action) from 5 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@v5...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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/docs-validation.yml

@@ -72,7 +72,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Check spelling
-        uses: streetsidesoftware/cspell-action@v5
+        uses: streetsidesoftware/cspell-action@v8
         with:
           files: 'docs/**/*.md'
           config: '.github/cspell.json'