Bump Spring Boot 4 to RC2 #5907

Job	Run time
system-test (sentry-samples-spring-boot-opentelemetry-noagent, false, true)	4m 34s
system-test (sentry-samples-spring-boot-opentelemetry, true, false)	4m 32s
system-test (sentry-samples-spring-boot-opentelemetry, true, true)	4m 37s
system-test (sentry-samples-spring-boot-webflux, false, true)	2m 23s
system-test (sentry-samples-spring-boot-4, false, true)	3m 19s
system-test (sentry-samples-console, false, true)	1m 6s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, true)	4m 42s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry-noagent, false, true)	4m 43s
system-test (sentry-samples-spring-boot, false, true)	2m 0s
system-test (sentry-samples-spring-boot-webflux-jakarta, false, true)	1m 49s
system-test (sentry-samples-logback, false, true)	55s
system-test (sentry-samples-spring, false, true)	1m 30s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, false)	4m 38s
system-test (sentry-samples-spring-boot-jakarta, false, true)	3m 39s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, true)	5m 52s
system-test (sentry-samples-jul, false, true)	1m 14s
system-test (sentry-samples-spring-boot-4-webflux, false, true)	2m 47s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, false)	5m 32s
system-test (sentry-samples-spring-7, false, true)	2m 5s
system-test (sentry-samples-log4j2, false, true)	59s
system-test (sentry-samples-spring-jakarta, false, true)	1m 50s
	1h 4m 46s

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