Update gps-nmea-data-101.md (serial protocol)

[Uhrmel]

changed number of stop bits from 'none' to '1'. In an asynchronous data transfer (UART) a receiver always needs at least one stop bit.

What This PR Changes

• (Please explain here why you created the pull request and specify what it changes)

Contribution Guidelines

• [x] I confirm that I have read the contribution guidelines and comply with them.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[jhansson-ard]

Hello @Uhrmel ! Please sign the CLA so that we can properly review your suggestion. Thank you!

[Uhrmel]

I marked the CLA field already 5 days ago and klicked recheck. So I confirm it again now so: I confirm that I have read the contribution guidelines and comply with them.

[jhansson-ard]

That is very strange, let me take a look to see if it's a problem on our end. Thank you for your patience 🙏🏼