doc: fix broken link of arch doc

[lukasjhan]

📝 Description

Fix broken link in README.md

🔄 Type of Change

Please delete options that are not relevant:

• 🐛 Bug fix (non-breaking change which fixes an issue)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality
  to not work as expected)
• 📚 Documentation update
• 🔧 Refactoring (no functional changes)
• ⚡ Performance improvement
• 🧪 Test improvements
• 🏗️ Build/CI changes

[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-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 55.87%. Comparing base (cc790f1) to head (7177460).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #471      +/-   ##
==========================================
+ Coverage   55.79%   55.87%   +0.08%     
==========================================
  Files         164      164              
  Lines        6010     6010              
  Branches     1359     1356       -3     
==========================================
+ Hits         3353     3358       +5     
+ Misses       2281     2276       -5     
  Partials      376      376              

Flag	Coverage Δ
e2e-test	55.87% <ø> (+0.08%)	⬆️

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see 1 file with indirect coverage changes

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[cre8]

Thank you for the fix :)