ci: use fmt-check #688

Job	Run time
Tests	1m 26s
Format	28s
Docker (chain, chain)	1m 47s
Clippy	54s
Docker (governance, governance)	1m 51s
Validate Swagger	26s
Docker (pos, pos)	1m 44s
Docker (rewards, rewards)	1m 44s
Docker (seeder, seeder)	1m 49s
Docker (webserver, webserver)	1m 43s
Docker (parameters, parameters)	1m 45s
Docker (transactions, transactions)	1m 44s
can_enqueue	1s
can_merge	1s
	17m 23s

Provide feedback