ci: bump the github-actions group with 2 updates

Bumps the github-actions group with 2 updates: [actions/cache](https://github.com/actions/cache) and [zizmorcore/zizmor-action](https://github.com/zizmorcore/zizmor-action).


Updates `actions/cache` from 5.0.5 to 6.0.0
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@27d5ce7...2c8a9bd)

Updates `zizmorcore/zizmor-action` from 0.5.6 to 0.5.7
- [Release notes](https://github.com/zizmorcore/zizmor-action/releases)
- [Commits](zizmorcore/zizmor-action@5f14fd0...192e21d)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: zizmorcore/zizmor-action
  dependency-version: 0.5.7
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/workflows/link-check.yaml

@@ -48,7 +48,7 @@ jobs:
 
       - name: Cache Puppeteer Chrome
         id: chrome-cache
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        uses: actions/cache@2c8a9bd7457de244a408f35966fab2fb45fda9c8 # v6.0.0
         with:
           path: ~/.cache/puppeteer
           key: puppeteer-${{ runner.os }}-${{ runner.arch }}-chrome-${{ env.CHROME_BUILD_ID }}

.github/workflows/zizmor.yaml

@@ -26,7 +26,7 @@ jobs:
           persist-credentials: false
 
       - name: Run zizmor (blocking, HIGH only)
-        uses: zizmorcore/zizmor-action@5f14fd08f7cf1cb1609c1e344975f152c7ee938d # v0.5.6
+        uses: zizmorcore/zizmor-action@192e21d79ab29983730a13d1382995c2307fbcaa # v0.5.7
         with:
           advanced-security: false
           annotations: true