Fix the GitHub Pages workflow (#71)

Author: carson-katri

.github/workflows/github_pages.yml

@@ -10,22 +10,22 @@ concurrency: preview-${{ github.ref }}
 
 jobs:
   deploy:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Setup mdBook
-        uses: peaceiris/actions-mdbook@v1
+        uses: peaceiris/actions-mdbook@v2
         with:
           mdbook-version: 'latest'
 
       - run: mdbook build
         working-directory: book
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: ${{ github.ref == 'refs/heads/main' }}
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}

book/book.toml

@@ -1,7 +1,6 @@
 [book]
 authors = ["Carson Katri"]
 language = "en"
-multilingual = false
 src = "src"
 title = "Geometry Script"