chore: Add external contributor to CHANGELOG.md (#15642)

This PR adds the external contributor to the CHANGELOG.md file, so that
they are credited for their contribution. See #15639

Co-authored-by: Lms24 <[email protected]>

Author: HazAT

CHANGELOG.md

@@ -10,7 +10,7 @@
 
 - "You miss 100 percent of the chances you don't take. — Wayne Gretzky" — Michael Scott
 
-Work in this release was contributed by @angelikatyborska. Thank you for your contribution!
+Work in this release was contributed by @angelikatyborska and @nwalters512. Thank you for your contributions!
 
 ## 9.5.0