fix: introspectinjector mutation handling

lab/introspect/server/introspectInjector.ts

@@ -44,7 +44,7 @@ export class IntrospectInjector extends PassthroughHandler<ExecutionResult> {
     await trackOperation(
       op.name,
       async () => {
-        baseqlOperationReturnValue = await this.upstream.query(op, payload);
+        baseqlOperationReturnValue = await this.upstream.mutation(op, payload);
         if (baseqlOperationReturnValue.errors?.length) throw baseqlOperationReturnValue.errors;
         return baseqlOperationReturnValue.data?.[op.name];
       },