Replaced Travis badge with Github actions badge
Replaced Travis badge with Github actions badge

DMPRoadmap/roadmap,CDLUC3/dmptool,DigitalCurationCentre/roadmap,DigitalCurationCentre/roadmap,CDLUC3/dmptool,DigitalCurationCentre/roadmap,CDLUC3/dmptool,DMPRoadmap/roadmap,DMPRoadmap/roadmap,CDLUC3/dmptool