chore(deps): update actions/cache digest to 640a1c2

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/cache	action	digest	5a3ec84 -> 640a1c2

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Configuration

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.40%. Comparing base (8bf777a) to head (b99eba3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1485      +/-   ##
============================================
+ Coverage     92.97%   93.40%   +0.42%     
- Complexity      488      490       +2     
============================================
  Files            46       46              
  Lines          1182     1182              
  Branches        103      103              
============================================
+ Hits           1099     1104       +5     
+ Misses           53       48       -5     
  Partials         30       30              

Flag	Coverage Δ
unittests	93.40% <ø> (+0.42%)	⬆️

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