Run danger on forked PR

Author: manicmaniac

.github/workflows/danger.yml

@@ -0,0 +1,28 @@
+name: danger
+on: pull_request_target
+jobs:
+  danger:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+      statuses: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          path: default
+      - uses: actions/checkout@v4
+        with:
+          ref: refs/pull/${{ github.event.pull_request.number }}/merge
+          path: topic
+          set-safe-directory: false
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.3'
+          bundler-cache: true
+          working-directory: default
+      - run: bundle exec danger --dangerfile=../default/Dangerfile
+        working-directory: topic
+        env:
+          BUNDLE_GEMFILE: ../default/Gemfile
+          DANGER_DO_NOT_POST_INVALID_DANGERFILE_ERROR: ''
+          DANGER_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/lint.yml

@@ -1,8 +1,8 @@
-name: Test
+name: test
 on: push
 jobs:
   test:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
     name: Ruby ${{ matrix.ruby-version }}
     strategy:
       matrix: