Update upgrade.md

Author: lunaaaw

indepth/development/upgrade.md

@@ -43,10 +43,10 @@ You can follow the steps below to upgrade Dynamic Web TWAIN:
 
 5. Deploy the new version files to your server and test. 
 
-For Dynamic Web TWAIN v16.0 and later, Dynamsoft Service is designed to be backward compatible. Once you upgrade Dynamic Web TWAIN for your application on the server side, for **end users' side**
+For Dynamic Web TWAIN v16.0 and later, Dynamsoft Service is designed to be backward compatible. Once you upgrade Dynamic Web TWAIN for your application on the server side, for **end-users' side**
 
-- If the end users have installed the same version or newer minor versions of Dynamsoft Service, they don't need to do anything;
-- If the end users have never installed Dynamsoft Service, have an older version or a different newer major version of it, they will be required to do a reinstallation of Dynamsoft Service. The process is described <a href="{{site.indepth}}deployment/service.html#how-to-install-dwt">here</a>  
+- If the end-users have installed the same version or newer minor versions of Dynamsoft Service, they don't need to do anything;
+- If the end-users have never installed Dynamsoft Service, or have an older version or a different newer major version of it, they will be required to do a reinstallation of Dynamsoft Service. The process is described <a href="{{site.indepth}}deployment/service.html#how-to-install-dwt">here</a>  
 
 ## Update `dwt` package
 
@@ -70,4 +70,4 @@ yarn add dwt
 
 ``` cmd
 yarn add @types/dwt
-```
+```