Fix cma documentation (#987)

Co-authored-by: Paul Jonas Jost <70631928+PaulJonasJost@users.noreply.github.com>
Co-authored-by: Daniel Weindl <dweindl@users.noreply.github.com>

pypesto/optimize/optimizer.py

@@ -662,9 +662,10 @@ def is_least_squares(self):
 
 class CmaesOptimizer(Optimizer):
     """
-    Global optimization using cma-es.
+    Global optimization using covariance matrix adaptation evolutionary search.
 
-    Package homepage: https://pypi.org/project/cma-es/
+    This optimizer interfaces the cma package
+    (https://github.com/CMA-ES/pycma).
     """
 
     def __init__(self, par_sigma0: float = 0.25, options: Dict = None):