Fix typo: seperately -> separately

Fixes #1064

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: wavebyrd

httpcore/_async/connection_pool.py

@@ -275,7 +275,7 @@ def _assign_requests_to_connections(self) -> list[AsyncConnectionInterface]:
         Called whenever a new request is added or removed from the pool.
 
         Any closing connections are returned, allowing the I/O for closing
-        those connections to be handled seperately.
+        those connections to be handled separately.
         """
         closing_connections = []
 

httpcore/_sync/connection_pool.py

@@ -275,7 +275,7 @@ def _assign_requests_to_connections(self) -> list[ConnectionInterface]:
         Called whenever a new request is added or removed from the pool.
 
         Any closing connections are returned, allowing the I/O for closing
-        those connections to be handled seperately.
+        those connections to be handled separately.
         """
         closing_connections = []