Fix install instruction in README

Author: alexandear

README.md

@@ -15,7 +15,7 @@ You can run it standalone through `go vet`.
 
 You must install the binary to your `$GOBIN` folder like so:
 ```sh
-$ go install github.com/macabu/inamedparam/cmd/inamedparam
+$ go install github.com/macabu/inamedparam/cmd/inamedparam@latest
 ```
 
 And then navigate to your Go project's root folder, where can run `go vet` in the following way: