Fix directed gnp_random_graph #3669

Job	Run time
Build, rustfmt, and python lint	2m 53s
python3.10-x64 macOS-latest	4m 53s
python3.10-x64 ubuntu-latest	4m 35s
python3.10-x64 windows-latest	3m 34s
python3.8-x64 macOS-latest	8m 24s
python3.8-x64 ubuntu-latest	4m 5s
python3.8-x64 windows-latest	10m 3s
python3.9-x64 macOS-latest	8m 17s
python3.9-x64 ubuntu-latest	4m 46s
python3.9-x64 windows-latest	11m 4s
python3.10-x64 macOS-latest	7m 25s
python3.10-x64 ubuntu-latest	3m 56s
python3.10-x64 windows-latest	7m 11s
python3.11-x64 macOS-latest	8m 52s
python3.11-x64 ubuntu-latest	4m 8s
python3.11-x64 windows-latest	9m 2s
python3.8-x64 ubuntu-latest MSRV	6m 16s
Coverage	8m 40s
Build Docs	10m 44s
python-stubs-3.8	3m 20s
python-stubs-3.9	2m 47s
python-stubs-3.10	4m 4s
python-stubs-3.11	3m 21s
	2h 22m 20s

Provide feedback