[Docs] fix ncnn docs (#378)

* fix ncnn docs`

* update 0216

docs/en/backends/ncnn.md

@@ -1,6 +1,6 @@
 ## ncnn Support
 
-MMDeploy now supports ncnn version == 1.0.20211208
+MMDeploy now supports ncnn version == 1.0.20220216
 
 ### Installation
 
@@ -27,7 +27,7 @@ You should ensure your gcc satisfies `gcc >= 6`.
 
     - Download ncnn source code
         ```bash
-        git clone -b 20211208 git@github.com:Tencent/ncnn.git
+        git clone -b 20220216 git@github.com:Tencent/ncnn.git
         ```
 
     - <font color=red>Make install</font> ncnn library
@@ -82,7 +82,7 @@ If you haven't installed NCNN in the default path, please add `-Dncnn_DIR` flag
 
 #### Reminder
 
-- In ncnn version >= 1.0.20201208, the dimension of ncnn.Mat should be no more than 4.
+- In ncnn version >= 1.0.20220216, the dimension of ncnn.Mat should be no more than 4.
 
 ### FAQs
 

docs/en/build/android.md

@@ -90,9 +90,9 @@ export OPENCV_ANDROID_SDK_DIR=${PWD}/OpenCV-android-sdk
   <tr>
     <td>ncnn </td>
     <td>A high-performance neural network inference computing framework supporting for android.</br>
-  <b> Now, MMDeploy supports v20211208 and has to use <code>git clone</code> to download it.</b><br>
+  <b> Now, MMDeploy supports v20220216 and has to use <code>git clone</code> to download it.</b><br>
 <pre><code>
-git clone -b 20211208 https://github.com/Tencent/ncnn.git
+git clone -b 20220216 https://github.com/Tencent/ncnn.git
 cd ncnn
 git submodule update --init
 export NCNN_DIR=${PWD}

docs/en/build/linux.md

@@ -330,7 +330,7 @@ export MMDEPLOY_DIR=$(pwd)
     3. <b>pplnn</b>: PPL.NN. <code>pplnn_DIR</code> is needed.
 <pre><code>-Dpplnn_DIR=${PPLNN_DIR}</code></pre>
     4. <b>ncnn</b>: ncnn. <code>ncnn_DIR</code> is needed.
-<pre><code>-Dncnn_DIR=${NCNN_DIR}</code></pre>
+<pre><code>-Dncnn_DIR=${NCNN_DIR}/build/install/lib/cmake/ncnn</code></pre>
     5. <b>openvino</b>: OpenVINO. <code>InferenceEngine_DIR</code> is needed.
 <pre><code>-DInferenceEngine_DIR=${INTEL_OPENVINO_DIR}/deployment_tools/inference_engine/share</code></pre>
     6. <b>torchscript</b>: TorchScript. <code>Torch_DIR</code> is needed.

docs/zh_cn/build/android.md

@@ -90,9 +90,9 @@ export OPENCV_ANDROID_SDK_DIR=${PWD}/OpenCV-android-sdk
   <tr>
     <td>ncnn </td>
     <td>ncnn 是支持 android 平台的高效神经网络推理计算框架</br>
-  <b> 目前, MMDeploy 支持 ncnn 的 20211208 版本, 且必须使用<code>git clone</code> 下载源码的方式安装</b><br>
+  <b> 目前, MMDeploy 支持 ncnn 的 20220216 版本, 且必须使用<code>git clone</code> 下载源码的方式安装</b><br>
 <pre><code>
-git clone -b 20211208 https://github.com/Tencent/ncnn.git
+git clone -b 20220216 https://github.com/Tencent/ncnn.git
 cd ncnn
 git submodule update --init
 export NCNN_DIR=${PWD}

docs/zh_cn/build/linux.md

@@ -320,7 +320,7 @@ export MMDEPLOY_DIR=$(pwd)
     3. <b>pplnn</b>: 表示 PPL.NN。需要设置 <code>pplnn_DIR</code>
 <pre><code>-Dpplnn_DIR=${PPLNN_DIR}</code></pre>
     4. <b>ncnn</b>: 表示 ncnn。需要设置 <code>ncnn_DIR</code>
-<pre><code>-Dncnn_DIR=${NCNN_DIR}</code></pre>
+<pre><code>-Dncnn_DIR=${NCNN_DIR}/build/install/lib/cmake/ncnn</code></pre>
     5. <b>openvino</b>: 表示 OpenVINO。需要设置 <code>InferenceEngine_DIR</code>
 <pre><code>-DInferenceEngine_DIR=${INTEL_OPENVINO_DIR}/deployment_tools/inference_engine/share</code></pre>
     6. <b>torchscript</b>: TorchScript. 需要设置<code>Torch_DIR</code>