Update Chromatic deployment action, to only deploy when needed.

Refactored the Chromatic deployment GitHub Action to enhance deployment
efficiency by ensuring actions only run when necessary.
Up until now, it triggered on every single push, regardless if the push
was made against an active pull request or not.

The workflow now triggers on push events for the main, develop, and
release/* branches, and on specific pull_request events. Added
concurrency control to prevent duplicate workflows from running
simultaneously by canceling in-progress actions if a new relevant event
occurs. These changes improve deployment efficiency, consistency, and
hopefully means we won't exceed the tokens as often.

.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