format newest CHANGES entries for 2.6.0

Author: orbeckst

CHANGES

@@ -12,8 +12,12 @@ The rules for this file:
   * accompany each entry with github issue/PR number (Issue #xyz)
   * release numbers follow "Semantic Versioning" https://semver.org
 
-01/20/2026 jhenin
 
+??/??/2026 jhenin
+
+  * 2.6.0
+
+Enhancements
   - Add flag to ignore NAMD's equilibration in NAMD parser
   - Accept NAMD data with 0 equilibration steps