Update README.md

Signed-off-by: Yuki Kishimoto <[email protected]>

Author: yukibtc

README.md

@@ -1,16 +1,21 @@
 # Coinbase API
 
-## Description
+## Installation
 
-Async Coinbase APIs for getting balances and transactions.
-
-## Usage
+Add the dependency to your `Cargo.toml`:
 
 ```toml
 [dependencies]
 coinbase-api = { git = "https://github.com/BNKRORG/coinbase-api", tag = "<version>" }
 ```
 
+## Supported APIs
+
+| API          | Supported |
+|--------------|-----------|
+| Coinbase App | ❌         |
+| Coinbase Pro | ❌         |
+
 ## Minimum Supported Rust Version (MSRV)
 
 This project is built with the Rust language version `2024` and requires a minimum compiler version of `1.85.0`.