plugin: Fix offsets for global 7.1 (OverlayPlugin#496)

(probably, `shieldPercentage` should be merged into `CharacterDetails`
as it's in the same internal struct in the game, but that's beyond the
scope of this PR)

Fix offsets for EntityMemory for patch 7.1

Job sigs and offsets seem fine. Not sure if any jobs had actual job
gauge data layout changes this patch, if so they can be fixed with a
separate PR.

plugin/CactbotEventSource/FFXIVProcessIntl.cs

@@ -8,7 +8,7 @@
 
 namespace Cactbot {
   public class FFXIVProcessIntl : FFXIVProcess {
-    // Last updated for FFXIV 7.0
+    // Last updated for FFXIV 7.1
 
     [StructLayout(LayoutKind.Explicit)]
     public unsafe struct EntityMemory {
@@ -41,10 +41,10 @@ public unsafe struct EntityMemory {
       [FieldOffset(0xC0)]
       public Single rotation;
 
-      [FieldOffset(0x1BC)]
+      [FieldOffset(0x1AC)]
       public CharacterDetails charDetails;
 
-      [FieldOffset(0x1E6)]
+      [FieldOffset(0x1D6)]
       public byte shieldPercentage;
     }