Also run PR checks on main (#1309)

* Run PR checks on on main and rename to "ci"

* Add status badge

* Fix name

Author: reakaleek

.github/workflows/pr.yml renamed to .github/workflows/ci.yml

@@ -1,6 +1,9 @@
-name: PR
+name: ci
 
 on:
+  push:
+    branches:
+      - main
   pull_request:
 
 permissions:

README.md

@@ -1,5 +1,7 @@
 # docs-builder
 
+[![ci](https://github.com/elastic/docs-builder/actions/workflows/ci.yml/badge.svg?branch=main&event=push)](https://github.com/elastic/docs-builder/actions/workflows/ci.yml)
+
 You've reached the home of the latest incarnation of the documentation tooling.
 
 This repository is host to: