Fix main → master

I keep forgetting this repo uses `master`, not `main`.

Author: mhucka

.github/workflows/ci-build-checks.yaml

@@ -14,15 +14,15 @@ on:
   pull_request:
     types: [opened, synchronize]
     branches:
-      - main
+      - master
 
   merge_group:
     types:
       - checks_requested
 
   push:
     branches:
-      - main
+      - master
 
   # Allow manual invocation, with options that can be useful for debugging.
   workflow_dispatch:

.github/workflows/ci-file-checks.yaml

@@ -19,15 +19,15 @@ on:
   pull_request:
     types: [opened, synchronize]
     branches:
-      - main
+      - master
 
   merge_group:
     types:
       - checks_requested
 
   push:
     branches:
-      - main
+      - master
 
   # Allow manual invocation, with options that can be useful for debugging.
   workflow_dispatch: