Update waitress requirement from ~=2.0 to ~=3.0 in the pip group (#34)

Updates the requirements on [waitress](https://github.com/Pylons/waitress) to permit the latest version.

Updates `waitress` to 3.0.1
- [Release notes](https://github.com/Pylons/waitress/releases)
- [Changelog](https://github.com/Pylons/waitress/blob/main/CHANGES.txt)
- [Commits](Pylons/waitress@v2.0.0...v3.0.1)

---
updated-dependencies:
- dependency-name: waitress
  dependency-type: direct:production
  dependency-group: pip
...

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

requirements.txt

@@ -1,3 +1,3 @@
 cloudflare~=2.0
 Flask~=2.0
-waitress~=2.0
+waitress~=3.0