zlib: Fix typo in comment

Restore the fix from commit bf019d765d (Fix spelling and typos
(non-binary), 2012-11-07, v2.8.12~414^2~7).
diff --git a/Utilities/cmzlib/zlib.h b/Utilities/cmzlib/zlib.h
index 0228179..46e2db4 100644
--- a/Utilities/cmzlib/zlib.h
+++ b/Utilities/cmzlib/zlib.h
@@ -869,7 +869,7 @@
      See inflateBack() for the usage of these routines.
 
      inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of
-   the paramaters are invalid, Z_MEM_ERROR if the internal state could not
+   the parameters are invalid, Z_MEM_ERROR if the internal state could not
    be allocated, or Z_VERSION_ERROR if the version of the library does not
    match the version of the header file.
 */