Update index.md

Edited first paragraph to clarify which heuristics are being referred to.

Author: jncrabb

public/content/developers/docs/design-and-ux/heuristics-for-web3/index.md

@@ -5,7 +5,7 @@ lang: en
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 Usability heuristics are broad “rules of thumb” that you can use to measure the usability of your site.
-These heuristics are specifically tailored for Web3 and should be used alongside Jakob Nielsen's [10 general principles for interaction design](https://www.nngroup.com/articles/ten-usability-heuristics/).
+The 7 heuristics here are specifically tailored for Web3 and should be used alongside Jakob Nielsen's [10 general principles for interaction design](https://www.nngroup.com/articles/ten-usability-heuristics/).
 
 ## Seven usability heuristics for web3 {#seven-usability-heuristics-for-web3}