Fix websocket span messages

[alexmojaki]

A user pointed out the websocket spans still had the route in the message, e.g. HTTP /ws/path/{param_name} instead of HTTP /ws/path/param_value.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (f2093b3) to head (580acc7).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #426   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          130       130           
  Lines         9501      9516   +15     
  Branches      1227      1229    +2     
=========================================
+ Hits          9501      9516   +15     

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