Add new tail-call WASM features (mdn#31040)

files/en-us/webassembly/reference/control_flow/call/index.md

@@ -6,7 +6,7 @@ page-type: webassembly-instruction
 
 {{WebAssemblySidebar}}
 
-**`call`** calls a function. `call_indirect` calls a function in a table.
+**`call`** calls a function, `return_call` being the tail-call version of it. `call_indirect` calls a function in a table with the `return_call_indirect` tail-call version as well.
 
 {{EmbedInteractiveExample("pages/wat/call.html", "tabbed-standard")}}
 
@@ -16,7 +16,14 @@ page-type: webassembly-instruction
 call $greet
 ```
 
-| Instruction     | Binary opcode |
-| --------------- | ------------- |
-| `call`          | `0x10`        |
-| `call_indirect` | `0x11`        |
+| Instruction            | Binary opcode |
+| ---------------------- | ------------- |
+| `call`                 | `0x10`        |
+| `call_indirect`        | `0x11`        |
+| `return_call`          | `0x12`        |
+| `return_call_indirect` | `0x13`        |
+
+## See also
+
+- [Tail Call Extension proposal overview](https://github.com/WebAssembly/tail-call/blob/main/proposals/tail-call/Overview.md)
+- [V8 on WebAssembly tail calls support](https://v8.dev/blog/wasm-tail-call)