infra: Update bot naming in angle_mb_config. This was missing from the original CL to update the perf bot names for Intel and NVIDIA. Bug: angleproject:7665 Change-Id: I2ec2640de665fe65ed6e21206355d68f2bc11265 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3904423 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org> Auto-Submit: Jamie Madill <jmadill@chromium.org>