Merge pull request #22 from nicksavers/patch-1

Update build/index.md: 2081 -> 2018

Author: jjmstark

docs/build/index.md

@@ -17,7 +17,7 @@ Need a more basic non-technical primer first? Check out [ethereum.org/learn.](/l
 
 
 - [Getting up to speed on Ethereum](https://medium.com/@mattcondon/getting-up-to-speed-on-ethereum-63ed28821bbe) *Aug 7, 2017 - Matt Condon*
-- [Ethereum In Depth, Part 1](https://blog.zeppelin.solutions/ethereum-in-depth-part-1-968981e6f833) *May 11, 2081 - Facu Spagnuolo*
+- [Ethereum In Depth, Part 1](https://blog.zeppelin.solutions/ethereum-in-depth-part-1-968981e6f833) *May 11, 2018 - Facu Spagnuolo*
 - [Ethereum In Depth, Part 2 ](https://blog.zeppelin.solutions/ethereum-in-depth-part-2-6339cf6bddb9) *July 24, 2018 - Facu Spagnuolo*
 - [Ethereum Development Walkthrough, Parts 1-5](https://hackernoon.com/ethereum-development-walkthrough-part-1-smart-contracts-b3979e6e573e) *Jan 14, 2018 - dev_zl*
 - [Ethereum 101, Parts 1-7](https://kauri.io/article/67a81d8746ee4b49ba19447e8e2a983e/v7/ethereum-101-part-1-what-is-ethereum) *Feb 13, 2019 - Wil Barnes*