Return type of `general_k_edge_subgraphs` is incorrect in docstring

In networkx 3.2.1, `general_k_edge_subgraphs` return type in docstring says this:
```
    k_edge_subgraphs : a generator of nx.Graphs that are k-edge-subgraphs
        Each k-edge-subgraph is a maximal set of nodes that defines a subgraph
        of G that is k-edge-connected.
```
However, it actually _yields_ (not returns) _graphs_, not sets of nodes.