Bump JamesIves/github-pages-deploy-action from 4.5.0 to 4.7.4

Bumps [JamesIves/github-pages-deploy-action](https://github.com/jamesives/github-pages-deploy-action) from 4.5.0 to 4.7.4.
- [Release notes](https://github.com/jamesives/github-pages-deploy-action/releases)
- [Commits](JamesIves/github-pages-deploy-action@v4.5.0...v4.7.4)

---
updated-dependencies:
- dependency-name: JamesIves/github-pages-deploy-action
  dependency-version: 4.7.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/pkgdown.yml

@@ -54,7 +54,7 @@ jobs:
         shell: Rscript {0}
 
       - name: Deploy to GitHub pages 🚀
-        uses: JamesIves/github-pages-deploy-action@v4.5.0
+        uses: JamesIves/github-pages-deploy-action@v4.7.4
         with:
           clean: false
           branch: gh-pages