Upgrade Spring Boot from 2.1.3 to 3.4.0 and Java from 8 to 21 - #1

Upgrade Spring Boot from 2.1.3 to 3.4.0 and Java from 8 to 21#1

yortch with Copilot wants to merge 4 commits into

test-generation-202508081447yortch/spring-petclinic-angularjs:test-generation-202508081447from

copilot/fix-3acd0e17-fcdd-4a32-93a0-7b2ab5884490yortch/spring-petclinic-angularjs:copilot/fix-3acd0e17-fcdd-4a32-93a0-7b2ab5884490Copy head branch name to clipboard