upgrade golang 1.21.3

[JeremyCraven]

Description

Upgrades the golang version from 1.18 to 1.21.3 and adds gosec to the github workflows

Motivation and Context

Keeps the tool up to date with golang and various security fixes.

Types of changes

No breaking changes

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[codecov-commenter]

Codecov Report

Merging #10 (5ebef74) into master (25120d4) will increase coverage by 1.70%.
The diff coverage is n/a.

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@@            Coverage Diff             @@
##           master      #10      +/-   ##
==========================================
+ Coverage   77.38%   79.08%   +1.70%     
==========================================
  Files           2        2              
  Lines         168      263      +95     
==========================================
+ Hits          130      208      +78     
- Misses         21       38      +17     
  Partials       17       17              

see 2 files with indirect coverage changes

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