Update README.md

rust-lang/rust-analyzer#6448 (comment)
intellij-rust/intellij-rust#8056

README.md

@@ -36,9 +36,13 @@ contains the tools to build clients and servers from [`protobuf`] definitions.
 Examples can be found in [`examples`] and for more complex scenarios [`interop`]
 may be a good resource as it shows examples of many of the gRPC features.
 
-If you're using [rust-analyzer] we recommend you set `"rust-analyzer.cargo.loadOutDirsFromCheck": true` to correctly load
+If you're using [rust-analyzer] we recommend you set `"rust-analyzer.cargo.runBuildScripts": true` to correctly load
 the generated code.
 
+For IntelliJ IDEA users, please refer to [this](https://github.com/intellij-rust/intellij-rust/pull/8056) and enable
+`org.rust.cargo.evaluate.build.scripts`
+[experimental feature](https://plugins.jetbrains.com/plugin/8182-rust/docs/rust-faq.html#experimental-features).
+
 ### Rust Version
 
 `tonic` currently works on Rust `1.56` and above as it requires support for the 2018 edition.