Revert "interpn not quadratic"

This reverts commit 34fb497.

Author: hollymandel

xarray/core/dataarray.py

@@ -2419,7 +2419,7 @@ def interp_like(
 
         4. **Interpolation along multiple dimensions of multi-dimensional data**
         - Uses :py:func:`scipy.interpolate.interpn` for methods {"linear", "nearest", "slinear",
-            "cubic", "quintic", "pchip"}.
+            "quadratic", "cubic", "quintic", "pchip"}.
 
         Parameters
         ----------