Add OSHWA certification logos

[shawaj]

Now approved https://certification.oshwa.org/uk000025.html

Email below:

This email serves as official confirmation that your hardware

PiJuice mPCIe

has now officially been certified as open source hardware by the Open Source Hardware Association. Congratulations!

Your UID is:

UK000025

Your hardware is now listed in the certification directly located here:

https://certification.oshwa.org/list.html

Please take a moment to verify that the information is correct.

Going forward, you can use your UID in conjunction with the certification mark as specified in the usage guidelines on your hardware:

https://github.com/oshwa/certification-mark

You can also generate an easy to use label for your licenses with this tool:

https://oshwa.github.io/certification-mark-generator/facts

Please let us know if you have any questions. And thank you for using OSHWA's open source hardware certification program.

-michael and the OSHWA certification team