chore: add friendly reminders if go mod tidy needs to be run #3620

Job	Run time
Protocol Buffer Lint and Gencode Up-to-date check	36s
image build	1m 54s
integration tests (standard)	3m 16s
go (examples)	1m 29s
go (sdk)	2m 12s
Validate PR title	2s
license check	58s
go (service)	3m 35s
go (lib/ocrypto)	1m 20s
go (lib/fixtures)	1m 21s
go (lib/flattening)	1m 19s
ci	1s
	18m 3s

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