fix(stacks): correct markdown reference link syntax in CAIP-2 (#166)

typo fix override to editorial policy

Author: bumblefudge

stacks/caip2.md

@@ -59,9 +59,9 @@ stacks:2147483648
 - [SIP-005][] - Blocks and Transactions
 - [API documentation][] - Core API info
 
-[SIP-005][https://github.com/stacksgov/sips/blob/main/sips/sip-005/sip-005-blocks-and-transactions.md]
-[API documentation][https://hirosystems.github.io/stacks-blockchain-api/#operation/get_core_api_info]
-[CAIP-2][https://github.com/ChainAgnostic/CAIPs/blob/master/CAIPs/caip-2.md]
+[SIP-005]: https://github.com/stacksgov/sips/blob/main/sips/sip-005/sip-005-blocks-and-transactions.md
+[API documentation]: https://hirosystems.github.io/stacks-blockchain-api/#operation/get_core_api_info
+[CAIP-2]: https://github.com/ChainAgnostic/CAIPs/blob/master/CAIPs/caip-2.md
 
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