Update GitHub Actions to use newer action versions

Author: hi-liang

.github/workflows/build.yml

@@ -13,14 +13,12 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v5
       - name: install asciidoctor
         run: sudo apt-get install -y asciidoctor
       - name: Build the site using asciidoctor
         run: make
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v4
         with:
           name: book.html
           path: book.html
-
-