Fix typo

Author: thekid

ChangeLog.md

@@ -6,7 +6,7 @@ XP Compiler ChangeLog
 ## 6.1.1 / 2021-01-04
 
 * Fixed issue #102: Call to a member function children()... - @thekid
-* Fixed issue #102: PHP 8.1 compatiblity - @thekid
+* Fixed issue #102: PHP 8.1 compatibility - @thekid
 * Fixed issue #103: Nullable types - @thekid
 
 ## 6.1.0 / 2021-01-04