Update install_setup.md

remove -e for paddle_scatter and paddle_sparse installation script

Author: HydrogenSulfate

docs/zh/install_setup.md

@@ -265,7 +265,7 @@ PaddleScience 提供了多种第三方库供用户在开发时使用，这些库
         cd PaddleScience
         git submodule update --init ppsci/externals/paddle_scatter
         # install from source(recommended)
-        python -m pip install -e ppsci/externals/paddle_scatter
+        python -m pip install ppsci/externals/paddle_scatter
         ```
 
     === "paddle_sparse"
@@ -274,7 +274,7 @@ PaddleScience 提供了多种第三方库供用户在开发时使用，这些库
         cd PaddleScience
         git submodule update --init ppsci/externals/paddle_sparse
         # install from source(recommended)
-        python -m pip install -e ppsci/externals/paddle_sparse
+        python -m pip install ppsci/externals/paddle_sparse
         ```
 
     === "tensorly"