chore: add friendly reminders if go mod tidy needs to be run #3578

Job	Run time
image build	1m 50s
go (examples)	1m 20s
Protocol Buffer Lint and Gencode Up-to-date check	50s
integration tests (standard)	3m 52s
go (sdk)	2m 12s
license check	56s
go (service)	3m 55s
Validate PR title	3s
go (lib/ocrypto)	1m 10s
go (lib/fixtures)	1m 6s
go (lib/flattening)	1m 36s
ci	1s
	18m 51s

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