fix the return type of bdb.Bdb.runeval

https://github.com/python/cpython/blob/daafacf0053e9c329b0f96447258f628dd0bd6f1/Lib/bdb.py#L924

Author: asottile

stdlib/bdb.pyi

@@ -88,7 +88,7 @@ class Bdb:
     def run(
         self, cmd: str | CodeType, globals: dict[str, Any] | None = None, locals: Mapping[str, Any] | None = None
     ) -> None: ...
-    def runeval(self, expr: str, globals: dict[str, Any] | None = None, locals: Mapping[str, Any] | None = None) -> None: ...
+    def runeval(self, expr: str, globals: dict[str, Any] | None = None, locals: Mapping[str, Any] | None = None) -> Any: ...
     def runctx(self, cmd: str | CodeType, globals: dict[str, Any] | None, locals: Mapping[str, Any] | None) -> None: ...
     def runcall(self, func: Callable[_P, _T], /, *args: _P.args, **kwds: _P.kwargs) -> _T | None: ...
     if sys.version_info >= (3, 14):