Add blank line before URL in docstring for ROS discovery plugin.

[tdenewiler]

Fixes warning from new version of docformatter.

[codecov[bot]]

Codecov Report

Merging #459 (40d0310) into main (70a1d19) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##              main      #459   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           58        58           
  Lines         3332      3332           
=========================================
  Hits          3332      3332           

Impacted Files	Coverage Δ
...ick_tool/plugins/discovery/ros_discovery_plugin.py	100.00% <ø> (ø)

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