chore: fix some comments for struct field #6473

Job	Run time
Fuzz	13m 4s
Unit (macos-12)	10m 31s
Unit (ubuntu-20.04)	6m 46s
Unit (ubuntu-22.04)	6m 39s
Unit (windows-2022)	10m 18s
Protobuf Lint	8s
Unit (custom-arm64-focal)	14m 12s
Up-to-date protobuf	23s
Unit (custom-arm64-jammy)	11m 49s
e2e	10m 42s
e2e_existing_network	3m 47s
Lint	3m 12s
Upgrade	3m 23s
Up-to-date mocks	2m 7s
Up-to-date go.mod and go.sum	19s
Build Antithesis avalanchego images	5m 19s
Build Antithesis xsvm images	8m 5s
Image build	10m 33s
	2h 1m 17s

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