Update Go versions in CI

[shuheiktgw]

SSIA. I've updated the outdated Go versions in CI to the latest.

Before submitting your PR, please confirm the following.

• Describe the purpose for which you created this PR.
• Create test code that corresponds to the modification

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.39%. Comparing base (3a90d71) to head (c20c5f2).

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #476      +/-   ##
==========================================
+ Coverage   78.78%   80.39%   +1.60%     
==========================================
  Files          13       17       +4     
  Lines        4007     4952     +945     
==========================================
+ Hits         3157     3981     +824     
- Misses        591      700     +109     
- Partials      259      271      +12