Update README.md

Author: anki-code

README.md

@@ -841,10 +841,7 @@ To install xontribs xonsh has [`xpip`](https://xon.sh/aliases.html?highlight=ali
 
 If you want to create your own xontrib [using xontrib-template](https://github.com/xonsh/xontrib-template) is the best way:
 ```python
-pipx install copier
-pipx inject copier jinja2-time
-pipx inject copier cookiecutter
-
+xpip install copier jinja2-time cookiecutter
 copier gh:xonsh/xontrib-template .
 ```