fix: replace sed with vgrep

[crumbtoo]

---

• [x] I have reviewed CONTRIBUTING.md.
• [x] My commits and title use the Conventional Commit format.

• [x] I have documented changes and additions in the CHANGELOG.md.

tested on Arch & OS X

[TorchedSammy]

(remove the date as well, heading should just be ## Unreleased)