Reduce update interval to avoid exceeding API quota limit
Reduce update interval to avoid exceeding API quota limit

We now make 3 requests for each repo. With 20 repos, this is 7200
requests per hour. Default quota limit is 5000.

dxw/fourth-wall-for-gitlab,HolyHaddock/fourth-wall,Wynndow/wynndow.github.io,alphagov/fourth-wall,HolyHaddock/fourth-wall,dxw/fourth-wall-for-gitlab,alphagov/fourth-wall,Wynndow/wynndow.github.io,dxw/fourth-wall-for-gitlab,HolyHaddock/fourth-wall,alphagov/fourth-wall,Wynndow/wynndow.github.io