platform-build-run-steps.yml

Increase the CI agent timeout to boot to UEFI Shell from
1 minute to 2 minutes.  There have been a few cases where
the boot to shell in QEMU has not quite completed in 1
minute and it is failing the CI check and preventing a PR
from being merged.

Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Michael Kubacki <mikuback@linux.microsoft.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Michael Kubacki <michael.kubacki@microsoft.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>