Miscellaneous updates

.github/workflows/spellcheck.yml

@@ -1,9 +1,9 @@
 name: "Check spelling"
-on: # rebuild any PRs and main branch changes
+on:
   push:
+  pull_request:
     branches-ignore:
       - "dependabot/**"
-  pull_request:
 
 permissions:
   contents: read
@@ -16,6 +16,7 @@ jobs:
       - uses: streetsidesoftware/cspell-action@v4
         with:
           check_dot_files: false
+          files: content/**/*.md
           incremental_files_only: true
           inline: warning
           strict: false