Update github workflow to main branch

instead of testing the now stale master, test the current main branch.

Change-Id: Ia480e81e08ed2e42b542a92d7564979f063e4cda
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/adhd/+/2682186
Reviewed-by: Curtis Malainey <cujomalainey@chromium.org>
Commit-Queue: Dylan Reid <dgreid@chromium.org>
Tested-by: Dylan Reid <dgreid@chromium.org>
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index f8818dc..e8af785 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -7,10 +7,10 @@
 
 on:
   push:
-    branches: [master]
+    branches: [main]
   pull_request:
     # The branches below must be a subset of the branches above
-    branches: [master]
+    branches: [main]
   schedule:
     - cron: '0 11 * * 1'