Upgrade imported github actions

Author: dontcallmedom

.github/workflows/auto-publish.yml

@@ -1,15 +1,16 @@
 name: Auto-publish
 on:
   pull_request: {}
+  paths: index.bs
   push:
     branches: [main]
 
 jobs:
   main:
     name: Build, Validate and Deploy
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: w3c/spec-prod@v2
         with:
           GH_PAGES_BRANCH: gh-pages