Update unipc.mdx (#2936)

docs/source/en/api/schedulers/unipc.mdx

@@ -16,7 +16,7 @@ specific language governing permissions and limitations under the License.
 
 UniPC is a training-free framework designed for the fast sampling of diffusion models, which consists of a corrector (UniC) and a predictor (UniP) that share a unified analytical form and support arbitrary orders.
 
-For more details about the method, please refer to the [[paper]](https://arxiv.org/abs/2302.04867) and the [[code]](https://github.com/wl-zhao/UniPC).
+For more details about the method, please refer to the [paper](https://arxiv.org/abs/2302.04867) and the [code](https://github.com/wl-zhao/UniPC).
 
 Fast Sampling of Diffusion Models with Exponential Integrator.