[Fundamentals] Update connection-limits.mdx

SHIP-9415

Author: ngayerie

src/content/docs/fundamentals/reference/connection-limits.mdx

@@ -45,11 +45,11 @@ Ensure HTTP keep-alive connections are enabled on your origin. Cloudflare reuses
 
 ## Request limits
 
-URLs have a limit of 16 KB. Request headers have a total limit of 32 KB, but each header is limited to 16 KB.
+URLs have a limit of 16 KB. Request headers have a total limit of 128 KB, and each header is limited to 128 KB.
 
 ## Response limits
 
-Response headers observe a total limit of 32 KB, but each header is limited to 16 KB.
+Response headers observe a total limit of 128 KB, and each header is limited to 128 KB.
 
 ## Cache limits