chore: update spring-boot to 3.3.6

[vaadin-bot]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.70%. Comparing base (0c0199b) to head (eb523f1).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2918   +/-   ##
=======================================
  Coverage   92.70%   92.70%           
=======================================
  Files          83       83           
  Lines        2851     2851           
  Branches      739      739           
=======================================
  Hits         2643     2643           
  Misses        157      157           
  Partials       51       51           

Flag	Coverage Δ
unittests	92.70% <ø> (ø)

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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