Swap Goerli Etherscan screenshots to reflect new Sepolia contract

Author: elPiablo

data/contributors.ts

@@ -21,12 +21,6 @@ export const contributors: ContributorLookup = {
     about:
       'Brian has been a member of the DeveloperDAO since November 2021, and enjoys building Web3 user experiences and smart contracts. Also active with Next.js, React and Serverless.',
   },
-  _7i7o: {
-    displayName: '7i7o',
-    moreInfoUrl: 'https://github.com/7i7o',
-    avatarUrl: 'https://avatars.githubusercontent.com/u/84824996?v=4',
-    about: '7i7o has been a member of the DeveloperDAO since October 2021.',
-  },
   piablo: {
     displayName: 'piablo',
     moreInfoUrl: 'https://twitter.com/Skruffster',

pages/lessons/projects/6.mdx

@@ -771,32 +771,32 @@ You can go into [Sepolia Etherscan](https://sepolia.etherscan.io/) block explore
 and search for this address that the command returned to check out your very own
 newly deployed smart contract!
 
-![ERC20.etherscan](/assets/lessons/6/ERC20.etherscan.png)
+![ERC20-etherscan](/assets/lessons/6/ERC20-etherscan.png)
 
 If you got to verify it, it also gives you a link to see your contract on the
 block explorer, in our case it's the last line the _Submitted contract for
 verification_ section: [Sepolia Etherscan](https://sepolia.etherscan.io/address/0xce68ed7aed9a1c6c185f2b8b576e7cbd7bf5daaf) **and** you get to see the code for
 the contract and all it's libraries right there in the tab named _Contract_ with
 a green checkmark.
 
-If you scroll down, you'll see our code. It was the last file of the set for me:
+If you scroll down, you'll see our code. It was the first file of the set for me:
 
-![ERC20.verified](/assets/lessons/6/ERC20.verified.png)
+![ERC20-verified](/assets/lessons/6/ERC20-verified.png)
 
 Etherscan also gives you a frontend to easily interact with the contract. Inside
 our contract tab, you get 3 tabs: Code, Read Contract and Write Contract.
 
 We can go and check for our balance by clicking in Read Contract tab and then
 searching for the `balanceOf` function:
 
-![ERC20.balanceOf](/assets/lessons/6/ERC20.balanceOf.png)
+![ERC20-balanceOf](/assets/lessons/6/ERC20-balanceOf.png)
 
 Copy and paste your wallet's address (the one you used to deploy the contract)
 and click Query. You should have as many wei as you passed to the constructor
 when deploying. In my case it was 1000000000000000000000 wei and since we left
 our decimals in 18, that would be exactly 1000 MTK. 
 
-![ERC20.1000MTK](/assets/lessons/6/ERC20.1000MTK.png)
+![ERC20-1000MTK](/assets/lessons/6/ERC20-1000MTK.png)
 
 ## Invite your frens!