(Azure CXP) Added a redirect condition

Added a redirect condition " RewriteCond %{REQUEST_URI} ^/$ "
https://github.com/MicrosoftDocs/azure-docs/issues/55805

Author: Grace-MacJones-MSFT

articles/app-service/containers/configure-language-php.md

@@ -82,7 +82,7 @@ The default PHP image for App Service uses Apache, and it doesn't let you custom
 ```
 <IfModule mod_rewrite.c>
     RewriteEngine on
-
+    RewriteCond %{REQUEST_URI} ^/$
     RewriteRule ^(.*)$ /public/$1 [NC,L,QSA]
 </IfModule>
 ```