update changelogs

Author: fern-support

fern/products/sdks/overview/typescript/changelog/2026-02-26.mdx

@@ -1,3 +1,10 @@
+## 3.51.4
+**`(fix):`** Add `cache: "no-store"` to streaming and SSE fetch requests to prevent
+Next.js from buffering streamed responses. The option is guarded by a
+cached runtime feature-detection so it is safely skipped in runtimes
+that do not support the `cache` RequestInit option (e.g. Cloudflare Workers).
+
+
 ## 3.51.3
 **`(fix):`** Fix duplicate case clauses in error handling switch statements when multiple errors
 map to the same status code. The generator now deduplicates errors by status code,