Bump streetsidesoftware/cspell-action from 6.7.1 to 6.8.0 (open-telem…

…etry#3555)

Bumps [streetsidesoftware/cspell-action](https://github.com/streetsidesoftware/cspell-action) from 6.7.1 to 6.8.0.
- [Release notes](https://github.com/streetsidesoftware/cspell-action/releases)
- [Changelog](https://github.com/streetsidesoftware/cspell-action/blob/main/CHANGELOG.md)
- [Commits](streetsidesoftware/cspell-action@2db9e5f...0e63b88)

---
updated-dependencies:
- dependency-name: streetsidesoftware/cspell-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/validate-documentation.yml

@@ -32,7 +32,7 @@ jobs:
         args: "--threads 1 --max-concurrency 1 --verbose --no-progress './**/*.md' './**/*.html'"
 
     - name: Run markdownlint
-      uses: streetsidesoftware/cspell-action@2db9e5fb6d08776bed383767ef4e5dd84650546c # tag: v6.7.1
+      uses: streetsidesoftware/cspell-action@0e63b882c2ef0e24d78b8b1fbb132b42c0a0d0cb # tag: v6.8.0
       with:
         files: '**/*.md'