Bump version of go-github library to v39

[gmlewis]

This PR is in preparation for release v39.0.0.

This release contains the following breaking API changes:

• Add List Options for ListRepositoryAccessRunnerGroup #2086

and the following additional changes:

• Update Cursor comment to reference an existing method #2042
• Add raw_key field to GPGKey struct #2043
• Upgrade crypto and net dependencies #2045
• Set up workflow for golangci #2020
• chore(ci) : cache go-build folders #2054
• Bump styfle/cancel-workflow-action from 0.9.0 to 0.9.1 #2049
• Fix update-urls unit tests broken by #1875 #2058
• Bump codecov/codecov-action from 2.0.2 to 2.0.3 #2065
• Introduce the auto merge property #2074
• Add support for autolinks #2046
• Implement SCIM #2062
• Add function for redelivering webhooks #2061
• Add struct for workflow_job event #2038
• Add created field to ListWorkflowRunsOptions #2083
• Update repo community profile API #2084

plus several test- or documentation-only changes.

[codecov]

Codecov Report

Merging #2087 (2b41d12) into master (ecb86f7) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2087   +/-   ##
=======================================
  Coverage   97.77%   97.77%           
=======================================
  Files         109      109           
  Lines        9724     9724           
=======================================
  Hits         9508     9508           
  Misses        150      150           
  Partials       66       66           

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[gmlewis]

@Parker77 - if you could please review this when you get a chance, that would be greatly appreciated.

[Parker77]

LGTM!

[gmlewis]

LGTM!

Thank you, @Parker77, for the fast response!