Bump upload-artifact action version

Author: dandavison

Diff for: .github/workflows/manual.yml

@@ -33,7 +33,7 @@ jobs:
         working-directory: manual
 
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v1
+        uses: actions/upload-pages-artifact@v3
         with:
           path: manual/book