chore(deps): Bump actions/configure-pages from 4 to 5

Bumps [actions/configure-pages](https://github.com/actions/configure-pages) from 4 to 5.
- [Release notes](https://github.com/actions/configure-pages/releases)
- [Commits](actions/configure-pages@v4...v5)

---
updated-dependencies:
- dependency-name: actions/configure-pages
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/deploy-book.yml

@@ -31,7 +31,7 @@ jobs:
           # Just add a `cd` here if you need to change to another directory.
           mdbook build ./pywr-book
       - name: Setup Pages
-        uses: actions/configure-pages@v4
+        uses: actions/configure-pages@v5
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v3
         with: