Update nwp in readme.md

[peterdudfield]

We now pull metoffice NWPs and also ECMWF NWPs. Would be good to reflect this in the readme.mds

[lambaaryan011]

Hey @peterdudfield I want to work on this. So, can you assign me this issue.

[lambaaryan011]

Hey @peterdudfield , I complete the issue, can you review it.

[lambaaryan011]

@peterdudfield can you mention this issue as close .because this is done