Fix configparser RawConfigParser.read: returns list[str | bytes]

Author: LeonDeKunlun

stdlib/configparser.pyi

@@ -269,7 +269,7 @@ class RawConfigParser(_Parser):
     def has_section(self, section: _SectionName) -> bool: ...
     def options(self, section: _SectionName) -> list[str]: ...
     def has_option(self, section: _SectionName, option: str) -> bool: ...
-    def read(self, filenames: StrOrBytesPath | Iterable[StrOrBytesPath], encoding: str | None = None) -> list[str]: ...
+    def read(self, filenames: StrOrBytesPath | Iterable[StrOrBytesPath], encoding: str | None = None) -> list[str | bytes]: ...
     def read_file(self, f: Iterable[str], source: str | None = None) -> None: ...
     def read_string(self, string: str, source: str = "<string>") -> None: ...
     def read_dict(self, dictionary: Mapping[str, Mapping[str, Any]], source: str = "<dict>") -> None: ...