fix: use either main or master branch for trigger

README.md

@@ -1,3 +1,17 @@
 # Github Actions Workflow Templates
 
 This is my collection of shared github actions workflows I use for my projects.
+
+For Ansible Galaxy you may want to set `github_branch` to main if you don't use the `master` in `meta/main.yml`:
+
+```yaml
+galaxy_info:
+
+  # Optionally specify the branch Galaxy will use when accessing the GitHub
+  # repo for this role. During role install, if no tags are available,
+  # Galaxy will use this branch. During import Galaxy will access files on
+  # this branch. If Travis integration is configured, only notifications for this
+  # branch will be accepted. Otherwise, in all cases, the repo's default branch
+  # (usually master) will be used.
+  github_branch: main
+```

ansible-roles/build.yml

@@ -1,12 +1,14 @@
-name: master and pr builds
+name: main and pr builds
 
 on:
   push:
-    branches: 
+    branches:
     - master
+    - main
   pull_request:
-    branches: 
+    branches:
     - master
+    - main
   workflow_dispatch:
 
 jobs: