Fix find_node_by_weight type annotations (#1324)

Author: IvanIsCoding

releasenotes/notes/fix-find-node-by-weight-stub-94e971291e1e6c96.yaml

@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    Fixed a bug in the type hints for :meth:`~rustworkx.PyGraph.find_node_by_weight`
+    and :meth:`~rustworkx.PyDiGraph.find_node_by_weight`.
+    Refer to `issue 1243 <https://github.com/Qiskit/rustworkx/issues/1322>`__ for
+    more information.

rustworkx/rustworkx.pyi

@@ -1224,7 +1224,7 @@ class PyGraph(Generic[_S, _T]):
     def filter_nodes(self, filter_function: Callable[[_S], bool]) -> NodeIndices: ...
     def find_node_by_weight(
         self,
-        obj: Callable[[_S], bool],
+        obj: _S,
         /,
     ) -> int | None: ...
     @staticmethod
@@ -1378,7 +1378,7 @@ class PyDiGraph(Generic[_S, _T]):
     def find_adjacent_node_by_edge(self, node: int, predicate: Callable[[_T], bool], /) -> _S: ...
     def find_node_by_weight(
         self,
-        obj: Callable[[_S], bool],
+        obj: _S,
         /,
     ) -> int | None: ...
     def find_predecessors_by_edge(