Grammatical error in the commented part
## Description
There is a grammatical error in the commented part of [exceptions.py](https://github.com/python-discord/sir-lancebot/blob/main/bot/utils/exceptions.py) 

## Possible Solutions
To reword/fix the comment.

## Would you like to implement a fix?
- [x] I'd like to implement the bug fix
- [ ] Anyone can implement the bug fix

diff --git a/bot/utils/exceptions.py b/bot/utils/exceptions.py
index 2b1c1b31..9e080759 100644
--- a/bot/utils/exceptions.py
+++ b/bot/utils/exceptions.py
@@ -1,4 +1,4 @@
 class UserNotPlayingError(Exception):
-    """Will raised when user try to use game commands when not playing."""
+    """Raised when users try to use game commands when they are not playing."""
 
     pass
['bot/utils/exceptions.py']