Bump rossjrw/pr-preview-action from 1.4.8 to 1.6.0

Bumps [rossjrw/pr-preview-action](https://github.com/rossjrw/pr-preview-action) from 1.4.8 to 1.6.0.
- [Release notes](https://github.com/rossjrw/pr-preview-action/releases)
- [Commits](rossjrw/pr-preview-action@v1.4.8...v1.6.0)

---
updated-dependencies:
- dependency-name: rossjrw/pr-preview-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/preview.yml

@@ -38,7 +38,7 @@ jobs:
         with:
           to: html
       - name: Deploy PR Preview
-        uses: rossjrw/pr-preview-action@v1.4.8
+        uses: rossjrw/pr-preview-action@v1.6.0
         with:
           source-dir: ./_output/
         env: