apacheGH-41748: [Python][Parquet] Update BYTE_STREAM_SPLIT descriptio…

…n in write_table() docstring

python/pyarrow/parquet/core.py

@@ -797,8 +797,9 @@ def _sanitize_table(table, new_schema, flavor):
     Specify if the byte_stream_split encoding should be used in general or
     only for some columns. If both dictionary and byte_stream_stream are
     enabled, then dictionary is preferred.
-    The byte_stream_split encoding is valid only for floating-point data types
-    and should be combined with a compression codec.
+    The byte_stream_split encoding is valid for integer, floating-point
+    and fixed-size binary data types (including decimals); it should be
+    combined with a compression codec so as to achieve size reduction.
 column_encoding : string or dict, default None
     Specify the encoding scheme on a per column basis.
     Can only be used when ``use_dictionary`` is set to False, and