!148 Fix error symbol.

From: @zhang_yi2020
Reviewed-by: @gemini524,@leonwanghui
Signed-off-by: @leonwanghui

security/comments_specification_en.md

@@ -295,7 +295,7 @@ Supported Platforms:
     - If the import path is long or a user-defined alias is required, add `from xxx import xxx as something` or `import xxx`. If the import path is short, place it in the code.
 - `Inputs` and `Outputs` Comment
 
-    - If the data type is Tensor, describe the shape in the format of :math:`(N, C, X)`.
+    - If the data type is Tensor, describe the shape in the format of :math:\`(N, C, X)\`.
 - Formula
     - Line formula (in the middle of the singly occupied line)
 

security/comments_specification_zh_cn.md

@@ -295,7 +295,7 @@ Supported Platforms:
     - 导入路径较长和必须自定义别名的导入需要加`from xxx import xxx as something`或`import xxx`，导入路径短的尽量放到代码中。
 - `Inputs`和`Outputs`注释说明
 
-    - 类型是Tensor时，需描述shape，并按:math:`(N, C, X)`格式写作。
+    - 类型是Tensor时，需描述shape，并按:math:\`(N, C, X)\`格式写作。
 - 公式
     - 行公式（单独占一行，居中）