Spatial KNN example notebook - incorrect filter for the dataframe df_bldg and df_bldg_shape

[danny-db]

Describe the bug
The spatial KNN notebook:
https://github.com/databrickslabs/mosaic/blob/main/notebooks/examples/python/SpatialKNN/02.%20Spatial%20KNN.py

Line 83 and 84:
df_bldg = spark.read.table("building_50k").where(mos.st_geometrytype(F.col("geom_wkt")) == "Point")
df_bldg_shape = spark.read.table("building_50k").where(mos.st_geometrytype(F.col("geom_wkt")) == "MultiPolygon")

The st_geometrytype returns POINT and MULTIPOLYGON in capital letter, therefore the correct code should be:
df_bldg = spark.read.table("building_50k").where(mos.st_geometrytype(F.col("geom_wkt")) == "POINT")
df_bldg_shape = spark.read.table("building_50k").where(mos.st_geometrytype(F.col("geom_wkt")) == "MULTIPOLYGON")

Otherwise the dataframe df_bldg and df_bldg_shape will be empty.

To Reproduce
Run the notebook

Expected behavior
df_bldg and df_bldg_shape not empty if the filter is working as expected.