chore: limit CI builds

We don't need duplicate builds on pull requests and pushes.  This should
cut our actions essentially down to half of what they are now.

PR-URL: #3981
Credit: @wraithgar
Close: #3981
Reviewed-by: @darcyclarke

Author: wraithgar

.github/workflows/ci.yml

@@ -1,7 +1,13 @@
 name: Node CI
 
-on: [push, pull_request]
-
+on:
+  pull_request:
+    branches:
+      - '*'
+  push:
+    branches:
+      - release-next
+      - latest
 jobs:
   lint:
     runs-on: ubuntu-latest