DOC: Structural inconsistency of quinn examples in the README documentation

[kunaljubce]

Quinn version checks

• [X] I have checked that the issue still exists on the latest versions of the docs on main here

Location of the documentation

README.md file

Documentation problem

We have a structural inconsistency in the quinn README examples. In some examples, it is of the format:

Function Name 
     |
Example
     |
Description

And in some other examples, the format is:

Function Name 
     |
Description
     |
Example

Suggested fix for documentation

From a new user point of view, the latter seems easier to follow, i.e.

Function Name 
     |
Description
     |
Example

Please create a PR to change all examples on README.md to fit this format.

[SemyonSinchenko]

@kunaljubce May I assign it to you?

[kunaljubce]

@SemyonSinchenko Wanted to label this a good first issue. I can take it up, no issues with that btw!