Update spell check workflow

Author: aliphys

.github/workflows/spell-check.yml

@@ -1,6 +1,7 @@
+# Source: https://github.com/per1234/.github/blob/main/workflow-templates/spell-check.md
 name: Spell Check
 
-# See: https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows
+# See: https://docs.github.com/en/actions/reference/events-that-trigger-workflows
 on:
   push:
   pull_request:
@@ -13,10 +14,12 @@ on:
 jobs:
   spellcheck:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
 
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
 
       - name: Spell check
-        uses: codespell-project/actions-codespell@master
+        uses: codespell-project/actions-codespell@v2