chore(str_from_console): Typing fix

Author: tony

libtmux/_compat.py

@@ -24,4 +24,4 @@ def str_from_console(s: t.Union[str, bytes]) -> str:
     try:
         return str(s)
     except UnicodeDecodeError:
-        return str(s, encoding="utf_8")
+        return str(s, encoding="utf_8") if isinstance(s, bytes) else s