Update .github/workflows/style-guide.yml

Author: themr0c

.github/workflows/style-guide.yml

@@ -8,6 +8,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
+      - name: Install Asciidoctor
+        run: sudo apt-get install -y asciidoctor
       - uses: errata-ai/vale-action@reviewdog
         with:
           filter_mode: diff_context