Fix regression on molgraph.

src/pymatgen/analysis/graphs.py

@@ -2420,7 +2420,7 @@ def find_rings(self, including=None) -> list[list[tuple[int, int]]]:
         for cycle in cycles_nodes:
             edges = []
             for idx, itm in enumerate(cycle):
-                edges.append((itm, cycle[idx - 1]))
+                edges.append((cycle[idx - 1], itm))
             cycles_edges.append(edges)
 
         return cycles_edges