MdePkg ACPI: fix the typos in Acpi61.h and Acpi62.h

MdePkg ACPI: fix the typos in Acpi61.h and Acpi62.h

The GUID for VIRTUAL_CD_REGION_PERSISTENT was using the closing
square bracket mistakenly.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>