Update version for the next release (v1.16.1) in Meilisearch.php (#788)

Co-authored-by: Strift <Strift@users.noreply.github.com>

Author: meili-bot

src/Meilisearch.php

@@ -6,7 +6,7 @@
 
 class Meilisearch
 {
-    public const VERSION = '1.16.0';
+    public const VERSION = '1.16.1';
 
     /**
      * @return non-empty-string