Remove mTLS from state that returns 404

.github/workflows/pr.yml

@@ -1,4 +1,7 @@
-on: pull_request
+on:
+  pull_request:
+  repository_dispatch:
+    types: [ok-to-test-command] # corresponds to ./ok-to-test.yml `commands:` field
 name: Pull request
 jobs:
   lint:
@@ -62,6 +65,9 @@ jobs:
     - name: Check diff
       run: |
         git diff --exit-code --ignore-all-space ./docs/
+
+  # NOTE: The following two `validate-` jobs (and the top-of-file config) are inspired by: https://github.com/imjohnbo/ok-to-test
+
   # Branch-based pull request from owner or trusted developer who has WRITE access.
   validate-interface-trusted:
     if: "!contains(github.event.pull_request.labels.*.name, 'breaking-change') && github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository"