Update tests where it's creating MatchmakingResutls.MatchProperties to use expected key

Author: FelixWentworth-Unity

tests/AllocatorTests/PlayFabAllocatorTests.cs

@@ -256,7 +256,7 @@ public async Task WillAllocateToSpecificRegion()
         var allocation = await _allocator.Allocate(_executionContextMock.Object, new AllocateRequest("1234",
             new MatchmakingResults(null, "matchId", "poolId", "poolName", "queueName", new Dictionary<string, object>
             {
-                { "region", "customRegion" }
+                { "Region", "customRegion" }
             })));
 
         using (Assert.EnterMultipleScope())
@@ -299,7 +299,7 @@ public async Task WillLogAndReturnAllocationErrorWhenRegionIsEmpty()
         var allocation = await _allocator.Allocate(_executionContextMock.Object, new AllocateRequest("1234",
             new MatchmakingResults(null, "matchId", "poolId", "poolName", "queueName", new Dictionary<string, object>
             {
-                { "region", string.Empty }
+                { "Region", string.Empty }
             })));
 
         using (Assert.EnterMultipleScope())