cicd: Run for build pull requests.

Codex- · Codex- · commit 0d871aa7c8eb · 2022-04-12T10:53:59.000+12:00
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
@@ -1,5 +1,6 @@
 name: build
 on:
+  pull_request:
   push:
 
 jobs:

-Original file line number
+Diff line change
@@ @@ -1,5 +1,6 @@ @@
 name: build
 on:
 +  pull_request:
   push:
 jobs: