fix(mods.rst): Use correct pip for onedir

gitea/mods/rst/files/default/grst

@@ -3,7 +3,7 @@
 import subprocess
 import sys
 
-from docutils import nodes, core, io
+from docutils import nodes, core
 from docutils.parsers.rst import directives, Directive
 
 

gitea/mods/rst/init.sls

@@ -24,6 +24,7 @@ RST external renderer pkg dependencies are installed:
 RST external renderer pip dependencies are installed:
   pip.installed:
     - names: {{ gitea.lookup.mod_rst.pip_dependencies | json }}
+    - bin_env: __slot__:salt:cmd.which('pip')
     - require:
       - RST external renderer pkg dependencies are installed