Added category-encoders library to known list (#2781)

## Changes
Whitelists category-encoders

### Linked issues
Partly resolve #1931

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

@@ -1168,6 +1168,34 @@
     "catalogue.tests": [],
     "catalogue.tests.test_catalogue": []
   },
+  "category-encoders": {
+    "category_encoders": [],
+    "category_encoders.backward_difference": [],
+    "category_encoders.base_contrast_encoder": [],
+    "category_encoders.basen": [],
+    "category_encoders.binary": [],
+    "category_encoders.cat_boost": [],
+    "category_encoders.count": [],
+    "category_encoders.datasets": [],
+    "category_encoders.datasets._base": [],
+    "category_encoders.glmm": [],
+    "category_encoders.gray": [],
+    "category_encoders.hashing": [],
+    "category_encoders.helmert": [],
+    "category_encoders.james_stein": [],
+    "category_encoders.leave_one_out": [],
+    "category_encoders.m_estimate": [],
+    "category_encoders.one_hot": [],
+    "category_encoders.ordinal": [],
+    "category_encoders.polynomial": [],
+    "category_encoders.quantile_encoder": [],
+    "category_encoders.rankhot": [],
+    "category_encoders.sum_coding": [],
+    "category_encoders.target_encoder": [],
+    "category_encoders.utils": [],
+    "category_encoders.woe": [],
+    "category_encoders.wrapper": []
+  },
   "causal-learn": {
     "causallearn": [],
     "causallearn.graph.AdjacencyConfusion": [],