Update graia-scheduler requirement from <0.1 to <0.4 (#26)

Updates the requirements on [graia-scheduler]() to permit the latest version.

---
updated-dependencies:
- dependency-name: graia-scheduler
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -14,7 +14,7 @@ graia-amnesia>=0.6.0
 graia-ariadne<0.12.0,>=0.11.5
 graia-broadcast>=0.19.2
 graia-saya>=0.0.16
-graia-scheduler<0.1
+graia-scheduler<0.4
 graiax-fastapi>=0.2.0
 graiax-playwright>=0.2.1
 graiax-shortcut>=0.2.1