fix: pin oasdiff Docker image to v1.13.5 instead of floating :stable tag#89

reuvenharrison merged 1 commit intooasdiff:mainoasdiff/oasdiff-action:mainfrom

lucasloisp:pin-oasdiff-docker-imagelucasloisp/oasdiff-action:pin-oasdiff-docker-imageCopy head branch name to clipboard