fix(ci): correct merged-coverage artifact path + log merged lanes #52

Job	Run time
lint-and-test	51s
e2e	1m 16s
parity	58s
parity-runtime	33m 12s
cross-compile	41s
parity-runtime-arm64-experimental	0s
parity-runtime-full	0s
coverage-report	29s
	37m 27s

Provide feedback