Use SortedDictionary for consistent order of persisted queries when w…

…riting relay format (#7078)

Co-authored-by: Michael Staib <michael@chillicream.com>

src/StrawberryShake/Tooling/src/dotnet-graphql/GenerateCommand.cs

@@ -209,7 +209,7 @@ private static async Task WritePersistedQueriesAsync(
         {
             if (relayFormat)
             {
-                var map = new Dictionary<string, string>();
+                var map = new SortedDictionary<string, string>();
 
                 foreach (var doc in result.Documents)
                 {