update changelogs

Author: Swimburger

fern/products/sdks/overview/typescript/changelog/2025-12-22.mdx

@@ -0,0 +1,22 @@
+## 3.43.1
+**`(fix):`** Fix bug where ts-morph would generate incorrect code when `Accept: */*` header would be defined as
+a parameter in OpenAPI. The old generated code would generate broken JSDoc comments with invalid syntax.
+
+
+**`(chore):`** Optimize generated SDK code by eliminating unnecessary `.toString()` calls on primitive types in headers
+and query parameters. The generator now only stringifies types that require it (dates/datetimes) while
+using primitives like strings, numbers, booleans, and UUIDs directly.
+
+
+**`(fix):`** Add `createNumericLiteralSafe` utility to properly handle negative numbers in generated code examples,
+ensuring compatibility with newer TypeScript/ts-morph versions that require prefix unary expressions.
+
+
+**`(fix):`** Add support for nullable types in query parameter type resolution, properly unwrapping both optional
+and nullable containers when determining primitive and object types.
+
+
+**`(chore):`** Simplify header and query parameter types from verbose union types to `Record<string, unknown>` for
+more flexible and less complex type signatures in generated SDKs.
+
+