chore(angular): update Angular min version in BREAKING.md

BREAKING CHANGE:

Ionic Framework no longer supports Angular versions <18 as they're currently End Of Life.

Author: eduardoRoth

BREAKING.md

@@ -52,7 +52,7 @@ This section details the desktop browser, JavaScript framework, and mobile platf
 **Minimum JavaScript Framework Versions**
 | Framework | Supported Version     |
 | --------- | --------------------- |
-| Angular   | 16+                   |
+| Angular   | 18+                   |
 | React     | 17+                   |
 | Vue       | 3.0.6+                |