fix: uses checksum action from github-actions repository

[JBAhire]

Description

removes reference to old actions repository and updates it to use custom action from github-actions repository.

Checklist:

• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been merged and published in downstream modules

Documentation

https://github.com/hypertrace/github-actions

[codecov]

Codecov Report

Merging #70 (2a331d6) into main (27b63cc) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main      #70   +/-   ##
=========================================
  Coverage     80.71%   80.71%           
  Complexity      222      222           
=========================================
  Files            27       27           
  Lines           752      752           
  Branches         56       56           
=========================================
  Hits            607      607           
  Misses           98       98           
  Partials         47       47           

Flag	Coverage Δ	Complexity Δ
integration	80.71% <ø> (ø)	0.00 <ø> (ø)
unit	67.77% <ø> (ø)	0.00 <ø> (ø)

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[github-actions]

Unit Test Results

20 files  ±0  20 suites  ±0   13s ⏱️ ±0s
75 tests ±0  75 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit aeb576c. ± Comparison against base commit 27b63cc.