fix: output yaml not pretty

[codecov-commenter]

Codecov Report

Base: 4.25% // Head: 4.25% // Decreases project coverage by -0.00% :warning:

Coverage data is based on head (61b92cf) compared to base (42dfbe5). Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #7 +/- ## ========================================= - Coverage 4.25% 4.25% -0.01% ========================================= Files 37 37 Lines 4325 4327 +2 ========================================= Hits 184 184 - Misses 4134 4136 +2 Partials 7 7 ``` | [Impacted Files](https://codecov.io/gh/luscis/openlan/pull/7?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=luscis) | Coverage Δ | | |---|---|---| | [pkg/libol/utils.go](https://codecov.io/gh/luscis/openlan/pull/7/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=luscis#diff-cGtnL2xpYm9sL3V0aWxzLmdv) | `21.07% <0.00%> (-0.20%)` | :arrow_down: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=luscis). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=luscis)

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