Add BC break note in CHANGELOG for 3.15

CHANGELOG

@@ -4,6 +4,8 @@
 
 # 3.15.0 (2024-11-17)
  
+ * [BC BREAK] Add support for accessing class constants with the dot operator;
+   this can be a BC break if you don't use UPPERCASE constant names
  * Add Spanish inflector support for the `plural` and `singular` filters in the String extension
  * Deprecate `TempNameExpression` in favor of `LocalVariable`
  * Deprecate `NameExpression` in favor of `ContextVariable`
@@ -25,7 +27,6 @@
  * Fix `power` expressions with a negative number in parenthesis (`(-1) ** 2`)
  * Deprecate instantiating `Node` directly. Use `EmptyNode` or `Nodes` instead.
  * Add support for inline comments
- * Add support for accessing class constants with the dot operator
  * Add `Profile::getStartTime()` and `Profile::getEndTime()`
  * Fix "ignore missing" when used on an "embed" tag
  * Fix the possibility to override an aliased block (via use)

doc/deprecated.rst

@@ -337,6 +337,9 @@ Node
 Operators
 ---------
 
+* The ``.`` operator allows accessing class constants as of Twig 3.15.
+  This can be a BC break if you don't use UPPERCASE constant names.
+
 * Using ``~`` in an expression with the ``+`` or ``-`` operators without using
   parentheses to clarify precedence triggers a deprecation as of Twig 3.15 (in
   Twig 4.0, ``+`` / ``-`` will have a higher precedence than ``~``).