Next Code & Learn events missing

[fhinkel]

We have at least two Code & Learns coming up but they're not listed on Nodejs.org.

The two events are at NodeConfEU and Interactive, see here for details.

Changes need to be added here:
https://github.com/nodejs/nodejs.org/blob/09d663cfd4c61eb5ac343033af460af19bcf6aec/locale/en/get-involved/code-and-learn.md