small fix to install command as no longer needs -p by default (#68947)

docs/docsite/rst/shared_snippets/installing_multiple_collections.txt

@@ -35,4 +35,4 @@ file used in older Ansible releases.
 .. note::
     While both roles and collections can be specified in one requirements file, they need to be installed separately.
     The ``ansible-galaxy role install -r requirements.yml`` will only install roles and
-    ``ansible-galaxy collection install -r requirements.yml -p ./`` will only install collections.
+    ``ansible-galaxy collection install -r requirements.yml`` will only install collections.