Merge pull request #642 from danskernesdigitalebibliotek/chromatic-ac…

…tion-tweak

Update Chromatic deployment action, to only deploy when needed.

.github/workflows/chromatic.yml

@@ -1,6 +1,21 @@
-name: "Chromatic"
+name: 'Chromatic'
+
+on:
+  push:
+    branches:
+      # Required for creating baselines
+      - main
+      - develop
+      - release/*
+  pull_request:
+    types: [ready_for_review, opened, synchronize]
+
+# Detect if this action is already running, and cancel it.
+# This most likely happened because a second push has been made to a branch.
+concurrency:
+  group: ${{ github.repository_id }}-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 
-on: push
 jobs:
   chromatic-deployment:
     runs-on: ubuntu-latest