Add release note

Bike · Bike · commit fa7875bebeda · 2024-06-24T19:26:32.000-04:00
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
@@ -2,6 +2,7 @@
 
 ## Fixed
 * Pathnames and filesystem operations support Unicode (#1595).
+* Package names support Unicode (#1596).
 
 # Version 2.6.0 (LLVM15-18) 2024-06-03
 
