ci: update checkout action to use main branch

Author: ax-sh

.github/workflows/ci.yml

@@ -4,14 +4,13 @@ on: pull_request
 #on: [pull_request, push]
 
 jobs:
-  name: Spelling
-  on: [pull_request]
   spelling:
     name: Spell Check with Typos
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Actions Repository
-        uses: actions/checkout@v4
+#        uses: actions/checkout@v4
+        uses: actions/checkout@main
       - name: Spell Check Repo
         uses: crate-ci/typos@master
 #  typos: