fix broken link

contracts/eoslib/mainpage.md

@@ -31,10 +31,9 @@ Welcome to the EOS.IO Documentation
 
 ## Smart Contract Developers
 - [Introduction to Contract Development Tutorial](https://eosio.github.io/eos/md_contracts_eoslib_tutorial.html)
-- [How to Deploy Smart Contracts](https://github.com/EOSIO/eos#accountssmartcontracts)
-- [Reference Introduction](https://eosio.github.io/eos/group__contractdev.html)
+- [How to Deploy Smart Contracts](https://github.com/EOSIO/eos#smartcontracts)
 - [RPC Interface](https://eosio.github.io/eos/group__eosiorpc.html)
-- API Reference
+- [API Reference](https://eosio.github.io/eos/group__contractdev.html)
 	- @ref database - APIs that store and retreive data on the blockchainEOS.IO organizes data according to the following broad structure
 	- @ref mathapi - Defines common math function
 	- @ref messageapi - Define API for querying message properties