update changelogs

Author: jsklan

fern/products/sdks/generators/php/changelog/2026-06-05.mdx

@@ -1,3 +1,10 @@
+## 2.10.9
+**`(fix):`** Fix dynamic snippet argument ordering for discriminated union factory methods
+with optional base properties. Required base fields now come before the variant
+value, and optional base fields come after, matching the PHP Method AST's
+automatic parameter reordering.
+
+
 ## 2.10.8
 **`(fix):`** Fix dynamic snippet generation: filter out unsupported bytes body arguments
 that produced syntax errors, and reorder IR-level path parameters (which have