Fix response data slice too small (#6248) #20288

Job	Run time
filter-changes	8s
quicktests	1m 37s
lint	2m 24s
unittests (ubuntu-22.04)	5m 5s
build (ubuntu-22.04)	43s
unittests (ubuntu-latest-arm-8-cores)	3m 51s
build (ubuntu-latest-arm-8-cores)	5m 5s
unittests (self-hosted, macOS, ARM64, go-spacemesh)	4m 51s
build (macos-13)	1m 58s
unittests (windows-2022)	5m 1s
build (self-hosted, macOS, ARM64, go-spacemesh)	24s
build (windows-2022)	6m 8s
ci-status	3s
	37m 18s

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