fix: new khiops hist doc in the demo. Better function reference in doc for hist

Author: ElouenGinat

docs/demo.ipynb

@@ -27,7 +27,7 @@
     "\n",
     "> 📚 For a didactic walk-through of optimal histograms — from the simplest to the\n",
     "> most complex — see the\n",
-    "> [Khiops histograms guide](https://github.com/KhiopsML/khiops-doc/blob/dev/docs/learn/histograms.md).\n"
+    "> histogram documentation in [Khiops fundations](https://khiops.org/learn/understand/)\n"
    ]
   },
   {

src/khisto/matplotlib/hist.py

@@ -48,7 +48,7 @@ def hist(
     ax : matplotlib.axes.Axes, optional
         Axes object to plot on. If not provided, the current axes will be used.
     **kwargs :
-        other keyword arguments are described in ``plt.hist()``. The ``bins``,
+        other keyword arguments are described in ``matplotlib.pyplot.hist``. The ``bins``,
         ``weights``, and stacked/multiple dataset features are not supported.
 
     Returns