contributing: upd: talk not just about install/ project

Author: Anton-Latukha

docs/contributing/contributing.md

@@ -122,7 +122,7 @@ cradle:
   cabal:
 ```
 
-Also note that the `install/` subdirectory is a different project, so if you want to work on this part of the code, you may also have to create an `install/hie.yaml` file.
+Also note that many subdirectories of a project are in itself are subprojects, so if you want to work on this part of the code, you may also have to create an `hie.yaml` files where `cabal` files reside.
 
 ### Manually testing your hacked HLS
 If you want to test HLS while hacking on it, follow the steps below.