Improve README.md formatting

[dnlplm]

No description provided.

[telit-fabiopo]

Please use markdownlint to check the README.md file.

For example in ubuntu you can use:
sudo snap install mdl
mdl README.md

[dnlplm]

Please use markdownlint to check the README.md file.

For example in ubuntu you can use: sudo snap install mdl mdl README.md

Fixed all, but the following:

README.md:5: MD013 Line length
README.md:23: MD013 Line length

First one is triggered by line > 80: I think 80 is too small, so better manage this with a style if we think we need it.
The second one is a code block, also this can be managed in the style.

[telit-fabiopo]

Those warning were already presents, so It's not a problem of your change.
I will check if is possible to change the line length limit.