Update pvsystem.py

Author: echedey-ls

pvlib/pvsystem.py

@@ -2060,7 +2060,13 @@ def retrieve_sam(name=None, path=None):
     CEC_Date                     NaN
     CEC_Type     Utility Interactive
     Name: AE_Solar_Energy__AE6_0__277V_, dtype: object
-    """
+
+    # using the latest CEC Inverter database, via URL
+    >>> inv_db = pvsystem.retrieve_sam(path="https://raw.githubusercontent.com/NREL/SAM/refs/heads/develop/deploy/libraries/CEC%20Inverters.csv")
+    >>> inv_db.keys()
+    Index(['ABB__PVI_3_0_OUTD_S_US_A__208V_', 'ABB__PVI_3_0_OUTD_S_US_A__240V_', ...],          
+          dtype='object', length=...)
+    """  # noqa: E501
     # error: path was previously silently ignored if name was given GH#2018
     if name is not None and path is not None:
         raise ValueError("Please provide either 'name' or 'path', not both.")