Style Markdown quotes for better readability

[frol]

Here is a post with a quote:

Sérgio [shared](https://t.me/neardev/38844) a great helper tool to implement your own meta-transactions relayer with really nice documentation: https://github.com/SurgeCode/near-relay

> Hey guys, created this library for the abstraction hack for making meta transactions and relaying way easier to use for developers. I’m gonna keep updating it with new features so let me know if you have any feedback!
> Drop a star if it’s helpful 👍

Here is how it is currently rendered on NEAR Social:

https://near.social/mob.near/widget/MainPage.N.Post.Page?accountId=tooling.community.devhub.near&blockHeight=112220268

Here is how quotes are rendered on GitHub:

I believe that GitHub's style is more clear that it is a quote than NEAR Social's one.