Rename GitHub workflow files

GitHub workflow file names have been updated to better reflect their specific uses. The php workflow file has been divided into php-ols, php-fpm, and php-nginx to accurately represent different PHP configurations each file is meant for.

.github/workflows/php-fpm.yml

@@ -1,4 +1,4 @@
-name: php
+name: php-fpm
 
 on:
   push:

.github/workflows/php-nginx.yml

@@ -1,4 +1,4 @@
-name: php
+name: php-nginx
 
 on:
   push:

.github/workflows/php-ols.yml

@@ -1,4 +1,4 @@
-name: php
+name: php-ols
 
 on:
   push: