Fix typo (#19)

* Fix typo

* Update push.yml

Author: staabm

.github/workflows/push.yml

@@ -1,6 +1,6 @@
 name: PHP Checks
 
-on: [push]
+on: [push, pull_request]
 
 jobs:
 
@@ -39,7 +39,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@master
-    - name: REX Linting
+    - name: Setup PHP
       uses: shivammathur/setup-php@master
       with:
         php-version: 7.1