Tweak GitHub setup for this repo

Signed-off-by: Nic Cope <nicc@rk0n.org>

.github/PULL_REQUEST_TEMPLATE.md

@@ -22,7 +22,7 @@ Fixes #
 I have:
 
 - [ ] Read and followed Crossplane's [contribution process].
-- [ ] Run `make reviewable test` to ensure this PR is ready for review.
+- [ ] Run `make reviewable` to ensure this PR is ready for review.
 
 ### How has this code been tested
 

.github/workflows/ci.yml

@@ -3,7 +3,7 @@ name: CI
 on:
   push:
     branches:
-      - master
+      - main
       - release-*
   pull_request: {}
   workflow_dispatch: {}