Optimize bytes.replace(b'', b'.')

Issue #26574: Optimize bytes.replace(b'', b'.') and
bytearray.replace(b'', b'.'): up to 80% faster. Patch written by Josh Snider.
diff --git a/Misc/ACKS b/Misc/ACKS
index e67f6d1..52eae69 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1376,6 +1376,7 @@
 Roy Smith
 Ryan Smith-Roberts
 Rafal Smotrzyk
+Josh Snider
 Eric Snow
 Dirk Soede
 Nir Soffer