fix: typo in index.rst (#1804)

fix: typo in index.rst (#1804)

Author: luxedo

docs/index.rst

@@ -19,7 +19,7 @@ Welcome to YOLOX's documentation!
 
 .. toctree::
    :maxdepth: 2
-   :caption: Demployment
+   :caption: Deployment
 
    demo/trt_py_readme
    demo/trt_cpp_readme
@@ -29,4 +29,4 @@ Welcome to YOLOX's documentation!
    demo/ncnn_cpp_readme
    demo/onnx_readme
    demo/openvino_py_readme
-   demo/openvino_cpp_readme
+   demo/openvino_cpp_readme