[CHERRY-PICK] DynamicTablesPkg: AmlLib: Fix CodeQL Issue

Without the addition of this cast, the compiler promotes 1 to
a UINT32, which leads CodeQL to complain that different
size types are being compared.

Signed-off-by: Oliver Smith-Denny <osde@linux.microsoft.com>

Author: os-d

DynamicTablesPkg/Library/Common/AmlLib/AmlEncoding/Aml.c

@@ -774,7 +774,7 @@ AmlSetPkgLength (
   // Write to the Buffer.
   *Buffer       = LeadByte;
   CurrentOffset = 1;
-  while (CurrentOffset < (Offset + 1)) {
+  while (CurrentOffset < (Offset + (UINT8)1)) {
     CurrentShift              = (UINT8)((CurrentOffset - 1) * 8);
     ComputedLength            = Length & (UINT32)(0x00000FF0 << CurrentShift);
     ComputedLength            = (ComputedLength) >> (4 + CurrentShift);