Update README.md

Author: stepancheg

README.md

@@ -1,6 +1,15 @@
 grpc-rust
 =========
 
+# The project is dead; long live the new project
+
+gRPC team is [developing shiny new gRPC implementation in Rust](https://groups.google.com/g/grpc-io/c/ExbWWLaGHjI/m/TJssglLiBgAJ),
+`grpc` crate name is transferred to them.
+
+This code is no longer maintained.
+
+# Original README.md
+
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