Update BuildApiTest.cs

Author: SimonCropp

src/ApiBuilderTests/BuildApiTest.cs

@@ -461,6 +461,21 @@ static BuildApiTest() =>
                 ]
             },
 
+            new()
+            {
+                Moniker = "net10.0",
+                Directives =
+                [
+                    "NET10_0",
+                    "NET10_0_OR_GREATER",
+                    "NET9_0_OR_GREATER",
+                    "NET8_0_OR_GREATER",
+                    "NET7_0_OR_GREATER",
+                    "NET6_0_OR_GREATER",
+                    "NET5_0_OR_GREATER",
+                ]
+            },
+
             new()
             {
                 Moniker = "netcoreapp2.0",