Update ovos-skill-hello-world requirement in /requirements

Updates the requirements on [ovos-skill-hello-world](https://github.com/OpenVoiceOS/skill-ovos-hello-world) to permit the latest version.
- [Release notes](https://github.com/OpenVoiceOS/skill-ovos-hello-world/releases)
- [Changelog](https://github.com/OpenVoiceOS/skill-ovos-hello-world/blob/dev/CHANGELOG.md)
- [Commits](OpenVoiceOS/ovos-skill-hello-world@V0.0.4a2...V0.0.4a6)

---
updated-dependencies:
- dependency-name: ovos-skill-hello-world
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements/skills-essential.txt

@@ -5,4 +5,4 @@ ovos-skill-stop>=0.3.0a4
 ovos-skill-personal~=0.0, >=0.0.4a1
 ovos-skill-naptime~=0.2, >=0.2.2
 ovos-skill-date-time>=0.2.3a4
-ovos-skill-hello-world~=0.0, >=0.0.4a2
+ovos-skill-hello-world~=0.0