fix(config_reader): Typing

Author: tony

src/tmuxp/config_reader.py

@@ -102,7 +102,7 @@ def _from_file(cls, path: pathlib.Path):
         content = open(path).read()
 
         if path.suffix in [".yaml", ".yml"]:
-            format: FormatLiteral = "yaml"
+            format: "FormatLiteral" = "yaml"
         elif path.suffix == ".json":
             format = "json"
         else: