fix(deps): update dependency io.grpc:grpc-bom to v1.68.2 (#2121) #1543

Job	Run time
build	32s
shellcheck	4s
setup-muzzle-matrix	32s
smoke-test (windows-2019, glassfish)	18s
smoke-test (windows-2019, jboss)	16s
smoke-test (windows-2019, jetty)	17s
smoke-test (windows-2019, liberty)	16s
smoke-test (windows-2019, tomcat)	13s
smoke-test (windows-2019, tomee)	17s
smoke-test (windows-2019, weblogic)	16s
smoke-test (windows-2019, wildfly)	16s
smoke-test (windows-2019, other)	16s
smoke-test (ubuntu-22.04, glassfish)	32s
smoke-test (ubuntu-22.04, jboss)	32s
smoke-test (ubuntu-22.04, jetty)	31s
smoke-test (ubuntu-22.04, liberty)	32s
smoke-test (ubuntu-22.04, profiler)	32s
smoke-test (ubuntu-22.04, tomcat)	32s
smoke-test (ubuntu-22.04, tomee)	32s
smoke-test (ubuntu-22.04, weblogic)	31s
smoke-test (ubuntu-22.04, websphere)	32s
smoke-test (ubuntu-22.04, wildfly)	31s
smoke-test (ubuntu-22.04, other)	31s
muzzle	1s
	9m 22s

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