chore(deps): bump github.com/cloudevents/sdk-go/v2 from 2.4.1 to 2.15.2 in /ci/pod/openfunction/function-example/test-body #16210

Job	Run time
build (ubuntu-20.04, linux_openresty, lua-resty-worker-events, t/plugin/[a-k]*)	29m 33s
build (ubuntu-20.04, linux_openresty, lua-resty-worker-events, t/plugin/[l-z]*)	31m 50s
build (ubuntu-20.04, linux_openresty, lua-resty-worker-events, t/admin t/cli t/config-center-yaml...	22m 37s
build (ubuntu-20.04, linux_openresty, lua-resty-worker-events, t/node t/pubsub t/router t/script ...	23m 9s
build (ubuntu-20.04, linux_openresty, lua-resty-events, t/plugin/[a-k]*)	30m 4s
build (ubuntu-20.04, linux_openresty, lua-resty-events, t/plugin/[l-z]*)	31m 44s
build (ubuntu-20.04, linux_openresty, lua-resty-events, t/admin t/cli t/config-center-yaml t/cont...	21m 31s
build (ubuntu-20.04, linux_openresty, lua-resty-events, t/node t/pubsub t/router t/script t/secre...	22m 17s
	3h 32m 45s

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