Add metrics documentation link (#5029) #6553

Job	Run time
system-test (sentry-samples-spring-boot-webflux-jakarta, false, true)	5m 20s
system-test (sentry-samples-spring-boot-webflux, false, true)	5m 22s
system-test (sentry-samples-spring-boot-4, false, true)	6m 5s
system-test (sentry-samples-spring-boot-opentelemetry, true, false)	7m 14s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, true)	7m 30s
system-test (sentry-samples-jul, false, true)	2m 33s
system-test (sentry-samples-console, false, true)	2m 19s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry-noagent, false, true)	7m 30s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, false)	7m 43s
system-test (sentry-samples-spring-boot, false, true)	6m 13s
system-test (sentry-samples-spring-boot-jakarta, false, true)	7m 13s
system-test (sentry-samples-spring-jakarta, false, true)	3m 59s
system-test (sentry-samples-spring-boot-opentelemetry, true, true)	7m 20s
system-test (sentry-samples-log4j2, false, true)	2m 25s
system-test (sentry-samples-spring-boot-4-webflux, false, true)	5m 26s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, true)	7m 29s
system-test (sentry-samples-spring-boot-opentelemetry-noagent, false, true)	7m 2s
system-test (sentry-samples-spring, false, true)	4m 11s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, false)	7m 53s
system-test (sentry-samples-spring-7, false, true)	4m 21s
system-test (sentry-samples-logback, false, true)	2m 13s
	1h 57m 21s

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