sed is not requirement now

Author: hsbt

doc/windows.md

@@ -80,13 +80,12 @@ make
 
 4.  If you want to build from GIT source, following commands are required.
     * `git`
-    * `sed`
     * `ruby` 3.0 or later
 
     You can use [scoop](https://scoop.sh/) to install them like:
 
     ```batch
-    scoop install git sed ruby
+    scoop install git ruby
     ```
 
 5.  You need to install required libraries using [vcpkg](https://vcpkg.io/) on