Update features.mdx

Author: syrusakbary

pages/runtime/features.mdx

@@ -10,6 +10,8 @@ Wasmer supports many different backends, depending on your needs:
   - _Cranelift_: normal compilation times, good performance
   - _LLVM_: slow compilation times, great performance
 * Other Runtimes:
+  - _V8_: ideal for iOS, Android and development.
+  - _Wasmi_: ideal for iOS, or any environment where only interpreters can run.
   - _JavascriptCore_: ideal for macOS. See [announcement](https://wasmer.io/posts/wasmer-3_3-and-javascriptcore)
   - _Browser_: to target the web