add note about new package

CHANGELOG.md

@@ -10,7 +10,7 @@
 * Extend: conditionally announce vCard 4.0 in case vobject version is >= 1.0.0
 * Fix: hook for server-side e-mail notification
 * Change: dependency PyPI/passlib (stale since 2020) replaced with PyPI/libpass >= 1.9.3
-* Extend: add a check whether bcrypt version is compatible with passlib(libpass) version
+* Extend: add a check whether bcrypt version is compatible with passlib(libpass) version (requires "packaging")
 
 ## 3.5.10
 * Improve: logging of broken calendar items during PUT