Fix stray quote in builder.md
Fix stray quote in builder.md

Signed-off-by: Taylor Brown <2833ab41c0964f39417391c2df87b0cfe8851c15@microsoft.com>
Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

thaJeztah/cli,docker/cli,docker/cli,dnephin/cli,thaJeztah/cli,cpuguy83/cli,cpuguy83/cli,dnephin/cli