Oh it's TAR. Wow. They could literally have chosen any other picture in the world.
And you're right, a quick Google image search shows they've stolen it from a company in Austen, Texas. https://poorpaulspaving.com/tar-and-chip/
Copyright not an issue for Quins social media team obvs.
Probably why they chose that pic - v low risk. They're obliged to pay out if the photographer/copyright owner comes calling, but how likely is that?
Having said that, they should really just use Pixabay:
https://pixabay.com/images/search/tarmac/