Bump Hugo version to 0.147.9 in CI workflow

Author: VaiTon

.github/workflows/hugo.yml

@@ -29,7 +29,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     env:
-      HUGO_VERSION: 0.145.0
+      HUGO_VERSION: 0.147.9
       HUGO_CACHEDIR: /tmp/hugo_cache
       HUGO_ENVIRONMENT: production
     steps: