themes: check prettier for hbs (#166)

.github/workflows/discourse-theme.yml

@@ -88,7 +88,7 @@ jobs:
         shell: bash
         run: |
           ${{ steps.js-pkg-manager.outputs.manager }} prettier --version
-          files=$(find javascripts desktop mobile common scss -type f \( -name "*.scss" -or -name "*.js" -or -name "*.gjs" \) 2> /dev/null) || true
+          files=$(find javascripts desktop mobile common scss -type f \( -name "*.scss" -or -name "*.js" -or -name "*.gjs" -or -name "*.hbs" \) 2> /dev/null) || true
           if [ -n "$files" ]; then
             ${{ steps.js-pkg-manager.outputs.manager }} prettier --check $files
           fi