Stabilize sample introspection build inputs

Agent-Logs-Url: https://github.com/fsprojects/FSharp.Data.GraphQL/sessions/89e5acaf-53c4-4e34-b7ed-ce34b90af854

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

Author: Copilot

samples/star-wars-fabulous-client/StarWars/Common.fs

@@ -6,7 +6,7 @@ open FSharp.Data.GraphQL
 module Commands =
 
     [<Literal>]
-    let IntrospectionPath = "../../../tests/FSharp.Data.GraphQL.IntegrationTests/introspection.json"
+    let IntrospectionPath = "introspection.json"
 
     type GraphQLApi = GraphQLProvider<IntrospectionPath>
     let GetCharactersData = GraphQLApi.Operation<"queries/FetchCharacters.graphql">()

samples/star-wars-fabulous-client/StarWars/StarWars.fsproj

@@ -17,6 +17,7 @@
     <Compile Include="Helpers.fs" />
     <Compile Include="Style.fs" />
     <Compile Include="Common.fs" />
+    <Content Include="introspection.json" />
     <None Include="queries\FetchCharacters.graphql" />
     <PackageReference Include="Xamarin.Forms" VersionOverride="4.0.0.425677" />
     <PackageReference Include="Xamarin.Essentials" VersionOverride="1.0.0" />