Hopefully fix issues running CI on remote forks

.github/workflows/chromatic.yml

@@ -7,7 +7,7 @@ on:
   push:
     paths:
       - web/**
-  pull_request:
+  pull_request_target:
     paths:
       - web/**
 
@@ -24,7 +24,11 @@ jobs:
       - uses: actions/checkout@v3
       - name: Check out code
         with:
+          # Make sure the actual branch is checked out when running on pull requests
+          ref: ${{ github.event.pull_request.head.ref }}
+          repository: ${{ github.event.pull_request.head.repo.full_name }}
           fetch-depth: 0
+
       - run: npm install --include=dev --force
         # 👇 Adds Chromatic as a step in the workflow
       - name: Publish to Chromatic