Fix crates.io link

Author: slinkydeveloper

README.md

@@ -1,5 +1,5 @@
 [![Documentation](https://img.shields.io/badge/doc-reference-blue)](https://docs.restate.dev)
-![crates.io](https://img.shields.io/crates/v/restate_sdk.svg)
+[![crates.io](https://img.shields.io/crates/v/restate_sdk.svg)](https://crates.io/crates/restate-sdk/)
 [![Examples](https://img.shields.io/badge/view-examples-blue)](https://github.com/restatedev/examples)
 [![Discord](https://img.shields.io/discord/1128210118216007792?logo=discord)](https://discord.gg/skW3AZ6uGd)
 [![Twitter](https://img.shields.io/twitter/follow/restatedev.svg?style=social&label=Follow)](https://twitter.com/intent/follow?screen_name=restatedev)