add 'nft' to anchor_asset_type values (#1221)

ecosystem/sep-0001.md

@@ -6,8 +6,8 @@ Title: Stellar Info File
 Author: stellar.org
 Status: Active
 Created: 2017-10-30
-Updated: 2021-05-17
-Version: 2.4.1
+Updated: 2022-05-27
+Version: 2.5.0
 ```
 
 ## Simple Summary
@@ -129,7 +129,7 @@ fixed_number | int | Fixed number of tokens, if the number of tokens issued will
 max_number | int | Max number of tokens, if there will never be more than `max_number` tokens
 is_unlimited | boolean | The number of tokens is dilutable at the issuer's discretion
 is_asset_anchored | boolean | `true` if token can be redeemed for underlying asset, otherwise `false`
-anchor_asset_type | string | Type of asset anchored. Can be `fiat`, `crypto`, `stock`, `bond`, `commodity`, `realestate`, or `other`.
+anchor_asset_type | string | Type of asset anchored. Can be `fiat`, `crypto`, `nft`, `stock`, `bond`, `commodity`, `realestate`, or `other`.
 anchor_asset | string | If anchored token, code / symbol for asset that token is anchored to. E.g. USD, BTC, SBUX, Address of real-estate investment property.
 attestation_of_reserve | url | URL to attestation or other proof, evidence, or verification of reserves, such as third-party audits.
 redemption_instructions | string | If anchored token, these are instructions to redeem the underlying asset from tokens.