Add zenodo link to Publications & citing page?

[SaraVilla]

At the bottom on https://we-are-ols.org/publications.html

and in Posters, slides, etc

maybe a link to OLS zenodo community page? that will always be updated :)

[SaraVilla]

extra suggestion on this page:

In Citing OLS work:

• provide a pre-made sentence for people to cite and reuse?