Bump lycheeverse/lychee-action in the gha group across 1 directory (#6958)

Bumps the gha group with 1 update in the / directory: [lycheeverse/lychee-action](https://github.com/lycheeverse/lychee-action).


Updates `lycheeverse/lychee-action` from 2.7.0 to 2.8.0
- [Release notes](https://github.com/lycheeverse/lychee-action/releases)
- [Commits](lycheeverse/lychee-action@a8c4c7c...8646ba3)

---
updated-dependencies:
- dependency-name: lycheeverse/lychee-action
  dependency-version: 2.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gha
...

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

Author: dependabot[bot]

.github/workflows/ci-linkchecks.yml

@@ -23,7 +23,7 @@ jobs:
 
       - name: Link Checker
         id: lychee
-        uses: lycheeverse/lychee-action@a8c4c7cb88f0c7386610c35eb25108e448569cb0
+        uses: lycheeverse/lychee-action@8646ba30535128ac92d33dfc9133794bfdd9b411
         with:
           token: ${{secrets.GITHUB_TOKEN}}
           fail: false