fix Rpc Ping sequence number #18544

Job	Run time
check-code	9m 16s
target-branch-check	1s
check-msrv	5m 2s
Check for 'skip-ci' label	1s
basic-simulator-ubuntu	13m 32s
cargo-udeps	7m 44s
beacon-chain-tests	22m 25s
cli-check	8m 11s
compile-with-beta-compiler	13m 30s
debug-tests-ubuntu	6m 34s
ef-tests-ubuntu	8m 57s
execution-engine-integration-ubuntu	9m 28s
fallback-simulator-ubuntu	11m 40s
network-tests	18m 13s
op-pool-tests	15m 59s
release-tests-ubuntu	30m 55s
release-tests-windows	39m 31s
slasher-tests	1m 40s
state-transition-vectors-ubuntu	2m 23s
test-suite-success	4s
	3h 45m 6s

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