minor documentation fix for Shan-Chen

7 jobs for shanchen in 11 minutes and 51 seconds (queued for 3 seconds)
Name Stage Failure
failed
tests-and-coverage Test
52.37s call     lbmpy_tests/phasefield/test_liquid_lens_angles.ipynb::lbmpy_tests/phasefield/test_liquid_lens_angles.ipynb
52.15s call lbmpy_tests/full_scenarios/schaefer_turek/scenario_schaefer_turek.py::test_schaefer_turek
49.78s call lbmpy_tests/full_scenarios/rod/scenario_rod.py::test_rod_scenario_simple
49.13s call lbmpy_tests/test_split_optimization.py::test_equivalence_short
============ 2 failed, 156 passed, 11 warnings in 478.53s (0:07:58) ============
Uploading artifacts...
coverage_report: found 59 matching files
Uploading artifacts to coordinator... ok
id=334702 responseStatus=201 Created token=VH7TNYyn
ERROR: Job failed: exit code 1