fix(docs): update FXRP address for Coston2 network (#1111)

Author: fassko

docs/fassets/developer-guides/2-fassets-fxrp-address.mdx

@@ -67,7 +67,7 @@ yarn hardhat run scripts/fassets/getFXRP.ts --network coston2
 The script will output the FXRP address for the FAssets system on the Coston2 network:
 
 ```bash
-FXRP address 0x8b4abA9C4BD7DD961659b02129beE20c6286e17F
+FXRP address 0x0b6A3645c240605887a5532109323A3E12273dc7
 ```
 
 :::note Network Addresses