Update README.md

[kruisdraad]

Add MLaB public connectors

[jsf-clabot]

All committers have signed the CLA.

[sharafian]

What are the prefixes of these connectors? I see g.nl-mlab1, are the other two g.solstice and g.iofv? You'll also want to open a PR to this file https://github.com/interledgerjs/moneyd-uplink-xrp/blob/master/connector_list.json so that your connectors will automatically be selected when people use moneyd.

It's awesome to see more people contributing to the connector list!

[kruisdraad]

we had an issue and i had to resolved that first. We just fixed it so you can see the 2 others now. The are g.nl-mlab1 g.nl-mlab2 and g.nl-mlab3

ill open the 2nd PR after dinner in about 1 hour (ps, still like to peer with you)