[service-desk] Fix whitespace issue causing black to fail

[edjmao]

I was developing another feature, but upon running make docker-qa, I was getting a black failure on service_desk.py. I thought I'd fix that so that future builds would pass.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 41.93%. Comparing base (c2a516a) to head (d4c6a4b).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1603   +/-   ##
=======================================
  Coverage   41.93%   41.93%           
=======================================
  Files          66       66           
  Lines        8535     8539    +4     
  Branches     1038     1038           
=======================================
+ Hits         3579     3581    +2     
- Misses       4823     4825    +2     
  Partials      133      133           

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