fix(ggml-sycl): add synchronization before exiting argsort kernel

- Add `stream->wait()` to ensure all kernels finish execution before proceeding
- This resolves potential race conditions in the argsort operation

Author: MengAiDev

ggml/src/ggml-sycl/ggml-sycl.cpp

@@ -1774,7 +1774,9 @@ static void argsort_f32_i32_sycl(const float *x, int *dst, const int ncols,
     } else {
         GGML_ABORT("fatal error");
     }
-}
+
+    // Ensure all kernels finish execution before proceeding further
+    stream->wait();
 
 static void argmax_f32_i32_sycl(const float *x, int *dst, const int ncols,
                                const int nrows, queue_ptr stream) {