chore(CI): escape PR title for slack webhook

.github/workflows/escape.yml

@@ -0,0 +1,24 @@
+name: escape
+
+on:
+  push:
+    branches: ['canary']
+  pull_request:
+    types: [opened, synchronize]
+
+jobs:
+  escape:
+    name: escape
+    runs-on: ubuntu-latest
+    steps:
+      - name: escape PR title in js
+        env:
+          PR_TITLE: ${{ github.event.pull_request.title }}
+        shell: bash
+        run: |
+          node -e 'console.log(`title=${JSON.stringify({ title: process.env.PR_TITLE })}`)'
+
+      - name: escape PR title via expression
+        shell: bash
+        run: |
+          echo ${{ toJSON({ title: github.event.pull_request.title }) }}

.github/workflows/retry_test.yml

@@ -34,6 +34,14 @@ jobs:
     if: ${{ github.event.workflow_run.conclusion == 'failure' && github.event.workflow_run.run_attempt >= 3 && !github.event.workflow_run.head_repository.fork }}
     runs-on: ubuntu-latest
     steps:
+      - name: escape PR title
+        id: title
+        env:
+          PR_TITLE: ${{ github.event.workflow_run.display_title }}
+        shell: bash
+        run: |
+          node -e 'console.log(`title=${JSON.stringify(process.env.TITLE)}`)' >> "$GITHUB_OUTPUT"
+
       - name: send webhook
         uses: slackapi/slack-github-action@v1.25.0
         with:
@@ -42,7 +50,7 @@ jobs:
           # (through slightly hacky means).
           payload: |
             {
-              "commit_title": "${{ github.event.workflow_run.display_title }}",
+              "commit_title": ${{ steps.title.outputs.title }},
               "commit_url": "github.com/${{ github.repository }}/commit/${{ github.event.workflow_run.head_sha }}",
               "workflow_run_url": "github.com/${{ github.repository }}/actions/runs/${{ github.event.workflow_run.id }}/attempts/${{ github.event.workflow_run.run_attempt }}"
             }