wslview: fix a bug that it can't open urls

[crossing]

Description

The command to execute becomes the string lname if the argument to wslview is not an file path (e.g. an url), due to a typo-ish bug.

Types of changes

Breaking change (fix or feature that would cause existing functionality to not work as expected) are no longer accepted

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist:

• I have read Code of Conduct and Contributing documentations.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.