github: Use prebuilt Docker images

Signed-off-by: Harsh Shandilya <msfjarvis@gmail.com>

.github/workflows/deploy_test.yml

@@ -21,14 +21,14 @@ jobs:
       run: hugo --minify -DEFb=https://msfjarvis.github.io/msfjarvis.website
 
     - name: Deploy
-      uses: peaceiris/actions-gh-pages@v2.5.0
+      uses: docker://peaceiris/gh-pages:latest
       env:
         ACTIONS_DEPLOY_KEY: ${{ secrets.ACTIONS_DEPLOY_KEY }}
         PUBLISH_BRANCH: gh-pages
         PUBLISH_DIR: ./public
 
     - name: Audit live URL
-      uses: jakejarvis/lighthouse-action@master
+      uses: docker://jakejarvis/lighthouse-action:latest
       with:
         url: 'https://msfjarvis.github.io/msfjarvis.website/'