Add acknowledgments to Georgiy Treyvus

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: DavidLiedle

src/SUMMARY.md

@@ -1,5 +1,7 @@
 # Summary
 
+- [Acknowledgments](./acknowledgments.md)
+
 - [The Default We Never Questioned](./ch01-the-default-we-never-questioned.md)
 - [gRPC — HTTP/2 in a Convincing Costume](./ch02-grpc.md)
 - [WebSockets and SSE — When You Need the Server to Talk Back](./ch03-websockets-sse.md)

src/acknowledgments.md

@@ -0,0 +1,3 @@
+# Acknowledgments
+
+Thanks to **Georgiy Treyvus**, CloudStreet Product Manager, whose idea started this book.