fix: change `self:uninstall` to `self uninstall` in `get-poetry.py` (#1722)

get-poetry.py

@@ -227,7 +227,7 @@ It will add the `poetry` command to {poetry}'s bin directory, located at:
 
 
 {platform_msg}
 {platform_msg}
 
 
-You can uninstall at any time with `poetry self:uninstall`,
+You can uninstall at any time with `poetry self uninstall`,
 or by executing this script with the --uninstall option,
 or by executing this script with the --uninstall option,
 and these changes will be reverted.
 and these changes will be reverted.
 """
 """