fix typo

Author: richvdh

bindings/matrix-sdk-crypto-js/CHANGELOG.md

@@ -2,7 +2,7 @@
 
 -   Extend `OlmDevice.markRequestAsSent` to accept responses to
     `SigningKeysUploadRequest`s.
--   Add a missing `const` for compatiblity with ECMAScript Module compatibility
+-   Add a missing `const` for compatibility with ECMAScript Module compatibility
     mode.
 -   Fix the body of `SignatureUploadRequest`s to match the spec.