READEM, services.yaml and DefaultController updated to reflect current BugSnag Symfony integration docs

Author: mclack

example/symfony54/README.md

@@ -1,4 +1,4 @@
-# Running BugSnag with Symfony 6
+# Running BugSnag with Symfony 5
 
 This example shows how to integrate BugSnag with Symfony 5.  Full instructions on how to set BugSnag up with Symfony can be found in [the official BugSnag documentation](https://docs.bugsnag.com/platforms/php/symfony/).
 
@@ -33,7 +33,7 @@ BUGSNAG_API_KEY=YOUR_API_KEY_HERE
 
 More information about configuring BugSnag can be found in [the configuration section of the BugSnag documentation](https://docs.bugsnag.com/platforms/php/symfony/configuration-options/).
 
-In Symfony 6 the BugSnag bundle should be automatically registered in the `config/bundles.php` file:
+In Symfony 5 the BugSnag bundle should be automatically registered in the `config/bundles.php` file:
 ```php
 return [
     // ...
@@ -78,4 +78,4 @@ Or for the command example:
 
 ```shell
 php bin/console app:crash
-```
+```

example/symfony54/src/Controller/.gitignore

@@ -16,7 +16,6 @@ public function __construct(\Bugsnag\Client $bugsnag)
     {
         $this->bugsnag = $bugsnag;
     }
-    
 
     /**
      * @Route("/", name="homepage")