fix indentation in GitHub CI workflow #698

Job	Run time
Tests: Type Check	22s
Lint JS	22s
Tests (addon-location)	56s
[email protected] : defaults with npm	1m 43s
Tests (test-app-location)	51s
[email protected] : typescript with npm	2m 15s
[email protected] : defaults with yarn	1m 29s
Tests (addon-only)	35s
[email protected] : defaults with pnpm	59s
[email protected] : typescript with yarn	1m 52s
Tests (monorepo with npm)	1m 34s
[email protected] : defaults with npm	1m 59s
[email protected] : typescript with pnpm	1m 47s
Tests (monorepo with yarn)	1m 20s
[email protected] : defaults with yarn	1m 33s
Tests (monorepo with pnpm)	52s
[email protected] : defaults with pnpm	1m 1s
Tests (rollup-build)	1m 4s
Tests (declarations-configuration)	39s
	23m 13s

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