Use box for Guid argument in CoercionTests per review feedback

Agent-Logs-Url: https://github.com/fsprojects/FSharp.Data.GraphQL/sessions/d2fe5523-e81b-4d08-813e-b7f106345347

Co-authored-by: xperiandri <2365592+xperiandri@users.noreply.github.com>

Author: Copilot

tests/FSharp.Data.GraphQL.Tests/Variables and Inputs/CoercionTests.fs

@@ -121,8 +121,8 @@ let private testOutputCoercion graphQLType (expected: 'a) (input: obj) =
 
 [<Fact>]
 let ``ID coerces output`` () =
-    testOutputCoercion IDType "abc" ("abc" : obj)
-    testOutputCoercion IDType "123" (123 : obj)
-    testOutputCoercion IDType "123" (123L : obj)
+    testOutputCoercion IDType "abc" (box "abc")
+    testOutputCoercion IDType "123" (box 123)
+    testOutputCoercion IDType "123" (box 123L)
     let guid = Guid.Parse "d6c684d9-aaaa-4e88-bbb2-0bb584f1661d"
-    testOutputCoercion IDType (string guid) (guid : obj)
+    testOutputCoercion IDType (string guid) (box guid)