ci: s/main/master

Author: phaux

.github/workflows/npm-test.yml

@@ -3,10 +3,10 @@ name: Run tests
 on:
   push:
     branches:
-      - main
+      - master
   pull_request:
     branches:
-      - main
+      - master
 
 jobs:
   test:

.github/workflows/release-please.yml

@@ -3,7 +3,7 @@ name: Release Please
 on:
   push:
     branches:
-      - main
+      - master
 
 permissions:
   contents: write