Fix prettier formatting in strict rules files

Add trailing commas to match prettier style requirements.

Author: Copilot

lib/strict-rules-gjs.js

@@ -5,5 +5,5 @@
  * definitions, execute "npm run update"
  */
 module.exports = {
-  'ember/template-no-log': 'error'
+  'ember/template-no-log': 'error',
 };

lib/strict-rules-gts.js

@@ -5,5 +5,5 @@
  * definitions, execute "npm run update"
  */
 module.exports = {
-  'ember/template-no-log': 'error'
+  'ember/template-no-log': 'error',
 };