Remove extraneous apostrophe

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>

Author: emmatyping

peps/pep-0784.rst

@@ -43,7 +43,7 @@ years to come. Zstandard compression is also implemented in both the ZFS and
 Btrfs filesystems.
 
 Zstandard's highly efficient compression has supplanted other modern
-compression formats, such as brotli, lzo, and ucl due to it's highly efficient
+compression formats, such as brotli, lzo, and ucl due to its highly efficient
 compression. While `LZ4 <https://lz4.org/>`_ is still used in very high
 throughput scenarios, Zstandard can also be used in some of these contexts.
 While inclusion of LZ4 is out of scope, it would be a compelling future