tests/cpydiff: Fix typo in types_bytes_keywords.py doc comments.

tests/cpydiff/types_bytes_keywords.py

@@ -2,6 +2,6 @@
 categories: Types,bytes
 description: bytes() with keywords not implemented
 cause: Unknown
-workaround: Pass the encoding as a positional paramter, e.g. ``print(bytes('abc', 'utf-8'))``
+workaround: Pass the encoding as a positional parameter, e.g. ``print(bytes('abc', 'utf-8'))``
 """
 print(bytes('abc', encoding='utf8'))