docs: fix docker mirror repository URL (#432)

Author: wancup

README.md

@@ -209,7 +209,7 @@ $ npx serverless invoke -f hello -d '{"foo":"bar"}'
 
 ### Docker
 
-Alternatively, you can build a Rust-based Lambda function in a [docker mirror of the AWS Lambda provided runtime with the Rust toolchain preinstalled](https://github.com/rustserverless/lambda-rust).
+Alternatively, you can build a Rust-based Lambda function in a [docker mirror of the AWS Lambda provided runtime with the Rust toolchain preinstalled](https://github.com/rust-serverless/lambda-rust).
 
 Running the following command will start a ephemeral docker container which will build your Rust application and produce a zip file containing its binary auto-renamed to `bootstrap` to meet the AWS Lambda's expectations for binaries under `target/lambda_runtime/release/{your-binary-name}.zip`, typically this is just the name of your crate if you are using the cargo default binary (i.e. `main.rs`)