doc: change demo format

LICENSE

@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2022 xfygogo
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

README.en.md

@@ -18,4 +18,4 @@ This project is used to generate CMakeLists.txt for OpenFOAM project.
     - run `ofCmakeConfig` to generate `CMakeLists.txt`
     - or run `occ`, which is a wrapper of `ofCmakeConfig` script, to generate `CMakeLists.txt` and `compile_commands.json`.
 
-[video demo](demo/occ_demo.mp4)
+[video demo](demo/occ_demo.gif)

README.md

@@ -23,4 +23,4 @@
 - `vscode` + `clangd`
 - `vim` + `coc-clangd`
 
-[视频演示](demo/occ_demo.mp4)
+[视频演示](demo/occ_demo.gif)