adds Symfony bundle info to profiler installation doc

Author: velPL

docs/config/xhprof.md

@@ -71,6 +71,16 @@ composer require --dev spiral/profiler:^3.0
 
 [Package documentation](https://github.com/spiral/profiler/tree/3.0)
 
+#### Symfony Framework
+
+Please mind, bundle in early development stage - feedback much appreciated
+
+```bash
+composer require --dev velpl/buggregator-profiler-bundle:^0.2
+```
+
+[Package documentation](https://github.com/velPL/buggregator-profiler-bundle)
+
 #### Any PHP project
 
 ```bash