Update python readme wrt mspyls & pyls

Since lsp-python-ms changed its priority from 1 to -1 in
emacs-lsp/lsp-python-ms@396c25c, it is no longer the first choice when
both is available.

modules/lang/python/README.org

@@ -79,14 +79,19 @@ This module has no direct prerequisites. Here are some of its soft dependencies.
 
 ** Language Server Protocol Support
 This module must be enabled with the =+lsp= flag, and the =:tools lsp= module
-must be enabled. LSP will try mspyls, then pyls; whichever is available.
+must be enabled. LSP will try pyls then mspyls; the first that is available.
 
-mypyls can be installed with ~M-x lsp-install-server~ after opening a python
-buffer.
-
-Alternatively, use the [[https://pypi.org/project/python-language-server/][Python Language Server]] instead. ~pip install
+*To use [[https://pypi.org/project/python-language-server/][Python Language Server]] (pyls)* install it with ~pip install
 'python-language-server[all]'~
 
+*To use mspyls*, install it with ~M-x lsp-install-server~ and add this to your
+private config.el:
+
+#+BEGIN_SRC elisp
+(after! lsp-python-ms
+  (set-lsp-priority! 'mspyls 1))
+#+END_SRC
+
 * Features
 This module supports LSP. It requires installation of [[https://pypi.org/project/python-language-server/][Python Language
 Server]] or [[https://github.com/Microsoft/python-language-server][Microsoft Language Server]], see [[Language Server Protocol Support][LSP Support]].