fix(automate): remove extra slash

[cdriesler]

Description & motivation

• Calls of automate_context.store_file_result() would fail for functions with the following error:

Client error '404 Not Found' for url 'https://latest.speckle.systems//api/stream/<streamId>/blob'

• This is because automation_run_data.speckle_server_url was being set with a trailing slash by Automate (e.g. https://latest.speckle.systems/) and the sdk appends /api/stream to that.

Changes:

• Changes url construction here (instead of Automate)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.65%. Comparing base (905377d) to head (078a6c8).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #346   +/-   ##
=======================================
  Coverage   87.65%   87.65%           
=======================================
  Files          95       95           
  Lines        5670     5670           
=======================================
  Hits         4970     4970           
  Misses        700      700           

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[gjedlicska]

🤦