chore: Add external contributor to CHANGELOG.md (#25136)

This PR adds the external contributor to the CHANGELOG.md file, so that
they are credited for their contribution. See #23315

Co-authored-by: andreiborza <168741329+andreiborza@users.noreply.github.com>

Author: javascript-sdk-gitflow[bot]

CHANGELOG.md

@@ -4,6 +4,8 @@
 
 - "You miss 100 percent of the chances you don't take. — Wayne Gretzky" — Michael Scott
 
+Work in this release was contributed by @zkasuran. Thank you for your contribution!
+
 ## 11.5.0
 
 ### Important Changes