only run workflow on commit to main branch

Signed-off-by: GitHub <noreply@github.com>

Author: shenanigansd

.github/workflows/lint.yaml

@@ -2,9 +2,13 @@
 
 name: Lint
 
-# Trigger the workflow on both push (to the main repository)
-# and pull requests (against the main repository, but from any repo).
-on: [push, pull_request]
+# Trigger the workflow on both push (to the main repository, on the main branch)
+# and pull requests (against the main repository, but from any repo, from any branch).
+on:
+  push:
+    branches:
+      - main
+  pull_request:
 # Brand new concurrency setting! This ensures that not more than one run can be triggered for the same commit.
 # It is useful for pull requests coming from the main repository since both triggers will match.
 concurrency: lint-${{ github.sha }}