fix: irc: isolate the socket connection attempt

Co-authored-by: dgw <dgw@technobabbl.es>

sopel/irc/backends.py

@@ -505,7 +505,7 @@ async def _run_forever(self) -> None:
         else:
             LOGGER.debug('Reader received EOF.')
 
-        # on socket deconnection
+        # on socket disconnection
         self._connected = False
 
         # cancel timeout tasks