Updated introspection comment to not include the current date to avoid unnecessary changes to checked-in remote schemas (#164)

Author: jimkyndemeyer

src/main/com/intellij/lang/jsgraphql/ide/editor/GraphQLIntrospectionHelper.java

@@ -428,7 +428,7 @@ void createOrUpdateIntrospectionOutputFile(String schemaText, IntrospectionOutpu
                 final String header;
                 switch (format) {
                     case SDL:
-                        header = "# This file was generated based on \"" + introspectionSourceFile.getName() + "\" at " + new Date() + ". Do not edit manually.\n\n";
+                        header = "# This file was generated based on \"" + introspectionSourceFile.getName() + "\". Do not edit manually.\n\n";
                         break;
                     case JSON:
                         header = "";