Bump version of go-github to v52.0.0

[gmlewis]

This release contains the following breaking API changes:

• Update Create/Update methods to return the workflow #2759

and the following additional changes:

• Bump go-github from 50.2.0 to 51.0.0 in /scrape #2740
• Add Topics to PushEventRepository #2742
• Add fields to Branch Protection endpoint #2744
• Add GetTime method to Timestamp #2743
• Bump golang.org/x/net from 0.8.0 to 0.9.0 in /scrape #2748
• Bump golang.org/x/oauth2 from 0.6.0 to 0.7.0 #2747
• Add DNS health checks support for GitHub Pages #2746
• Add Owner to EditChange struct #2750
• Bump codecov/codecov-action from 3.1.1 to 3.1.2 #2761
• Add HeadBranch field to WorkflowJob #2764
• Add requester to InstallationEvent #2763
• Add InstallationsCount to App #2765

[codecov]

Codecov Report

Merging #2766 (d981f22) into master (848d85f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2766   +/-   ##
=======================================
  Coverage   98.05%   98.05%           
=======================================
  Files         132      132           
  Lines       11638    11638           
=======================================
  Hits        11412    11412           
  Misses        154      154           
  Partials       72       72           

Impacted Files	Coverage Δ
github/github.go	97.94% <ø> (ø)

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