chore: use approve command for contributor gate

.github/workflows/approve-contributor.yml

@@ -2,7 +2,7 @@ name: Approve Contributor
 
 on:
   issue_comment:
-    types: [created]
+    types: [created, edited]
 
 jobs:
   approve:
@@ -29,8 +29,8 @@ jobs:
             const commentBody = context.payload.comment.body || '';
             const approvedFile = '.github/APPROVED_CONTRIBUTORS';
 
-            if (!/^\s*lgtm\b/i.test(commentBody)) {
-              console.log('Comment does not match lgtm');
+            if (!/(^|\s)\/approve(?=$|\s)/i.test(commentBody)) {
+              console.log('Comment does not contain /approve');
               core.setOutput('status', 'skipped');
               return;
             }

.github/workflows/pr-gate.yml

@@ -109,7 +109,7 @@ jobs:
               '**Next steps:**',
               '1. Open an issue describing what you want to change and why',
               '2. Keep it concise and write in your own voice',
-              '3. If a maintainer approves with `lgtm`, you will be added to the approved contributors list',
+              '3. If a maintainer approves with `/approve`, you will be added to the approved contributors list',
               '4. Then you can submit your PR',
               '',
               `This PR will be closed automatically. See https://github.com/${context.repo.owner}/${context.repo.repo}/blob/${defaultBranch}/CONTRIBUTING.md for more details.`,