Update runtime.mdx

Author: syrusakbary

pages/runtime.mdx

@@ -27,7 +27,7 @@ To run a package, check out the [Getting Started](/runtime/get-started/) guide.
 
 The Wasmer Runtime supports multiple backends, depending on your needs:
 
-### Native backends:
+### Wasmer backends:
 
 - **Singlepass**: A single-pass compiler for fast compilation times and low memory usage.
 - **Cranelift**: A fast compiler backend with a focus on compile times, and runtime performance.
@@ -37,4 +37,7 @@ The Wasmer Runtime supports multiple backends, depending on your needs:
 
 - **Browser**: it allows running Wasmer fully in the browser (via `wasm-bindgen`).
 - **JavascriptCore**: it allows running Wasmer using the WebAssembly engine inside JavascriptCore
-- **V8** _(coming soon)_: it allows running Wasmer using the WebAssembly engine inside V8
+- **V8**: it allows running Wasmer using the WebAssembly engine inside V8 (can be run interpreter or with JIT)
+- **WAMR**: it allows running Wasmer using the WAMR interpreter
+- **wasmi**: it allows running the wasmi interpreter
+