Update actions/checkout action to v3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v2 -> v3

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Release Notes

actions/checkout

v3

Compare Source

• Add input set-safe-directory

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Configuration

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[codecov]

Codecov Report

Merging #92 (2d7a643) into master (27b8855) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #92   +/-   ##
=======================================
  Coverage   99.47%   99.47%           
=======================================
  Files          15       15           
  Lines         381      381           
  Branches       12       12           
=======================================
  Hits          379      379           
  Partials        2        2           

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