CI

update substrate-relay to 1.8.0 #165

# to view logs

Run time

Learn about OS # on GitHub Actions

Job	Run time
set-variables	1s
Spellcheck	1m 8s
Clippy	6m 48s
Cargo fmt	1m 9s
Check	5m 47s
Test	3m 40s
Build	3m 24s
Check Rustdocs	2m 53s
Deny	2m 11s
Deny License	2m 34s
Build docker image	15s
	29m 50s