ci: use `-Cinstrument-coverage` instead of `-Zprofile` #93

Job	Run time
Clippy	31s
Code Coverage (ubuntu-latest, unix)	1m 27s
Docs	18s
Rustfmt	9s
Code Coverage (macos-latest, macos)	1m 44s
Code Coverage (windows-latest, windows)	3m 18s
Test Suite	21s
	7m 48s

Provide feedback