shared-bindings/zlib: Fix docs for zlib.decompress.

The docs say the method is called `zlib_decompress` but should be
just `decompress`.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

shared-bindings/zlib/__init__.c

@@ -48,7 +48,7 @@
 //| (commonly used in zlib library and gzip archiver). Compression is not yet implemented."""
 //|
 
-//| def zlib_decompress(
+//| def decompress(
 //|     data: bytes, wbits: Optional[int] = 0, bufsize: Optional[int] = 0
 //| ) -> bytes:
 //|     """Return decompressed *data* as bytes. *wbits* is DEFLATE dictionary window