fix(tasks_api): fixed get_run to use proper function

[russorat]

Closes #

Proposed Changes

Briefly describe your proposed changes:
I was trying to get a single run for a task and was getting the following error:
Got an unexpected keyword argument 'run_id' to method get_tasks_id_runs

From what I could tell, the lib was using the wrong function to get a specific run by id.

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• pytest tests completes successfully
• Commit messages are in semantic format
• Sign CLA (if not already signed)

[codecov]

Codecov Report

Merging #193 (bcf43a7) into master (38bf155) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master     #193   +/-   ##
=======================================
  Coverage   89.83%   89.83%           
=======================================
  Files          26       26           
  Lines        1967     1967           
=======================================
  Hits         1767     1767           
  Misses        200      200           

Impacted Files	Coverage Δ
influxdb_client/client/tasks_api.py	81.31% <0.00%> (ø)

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[bednar]

Thanks for PR!