Added isodate to known list (#2946)

## Changes
Added `isodate` to known list 

### Linked issues
Partly resolve #1931

Author: pritishpai

src/databricks/labs/ucx/source_code/known.json

@@ -6631,6 +6631,18 @@
     "ipywidgets.widgets.widget_time": [],
     "ipywidgets.widgets.widget_upload": []
   },
+  "isodate": {
+    "isodate": [],
+    "isodate.duration": [],
+    "isodate.isodates": [],
+    "isodate.isodatetime": [],
+    "isodate.isoduration": [],
+    "isodate.isoerror": [],
+    "isodate.isostrf": [],
+    "isodate.isotime": [],
+    "isodate.isotzinfo": [],
+    "isodate.tzinfo": []
+  },
   "isoduration": {
     "isoduration": [],
     "isoduration.constants": [],
@@ -31117,4 +31129,4 @@
     "zipp.compat.py310": [],
     "zipp.glob": []
   }
-}
+}