SNOW-2867995: Add changelog entry for centos7 to rockylinux8 migration

Made-with: Cursor

Author: sfc-gh-dheyman

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 # Changelog
 - v4.1.1-SNAPSHOT
+    - Migrated CI test images from CentOS 7 (EOL) to Rocky Linux 8
 - v4.1.0
     - Added warning about using plain HTTP OAuth endpoints (snowflakedb/snowflake-jdbc#2556).
     - Fix initializing ObjectMapper when DATE_OUTPUT_FORMAT is specified (snowflakedb/snowflake-jdbc#2545).