chore: Correct example syntax in Client constructor (#436)

#428 fixed most of the odd quotes but I saw this one was left

Author: nealrichardson

src/posit/connect/client.py

@@ -105,7 +105,7 @@ def __init__(self, url: str) -> None:
 
         Examples
         --------
-        Client("https://connect.example.com)
+        Client("https://connect.example.com")
         """
 
     @overload