Bump constantly from 15.1.0 to 23.10.4

Bumps [constantly](https://github.com/twisted/constantly) from 15.1.0 to 23.10.4.
- [Commits](twisted/constantly@15.1.0...23.10.4)

---
updated-dependencies:
- dependency-name: constantly
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

requirements/tox-pin-base.txt

@@ -2,7 +2,7 @@ attrs==24.2.0
 Automat==22.10.0; python_version < '3.13'
 Automat==24.8.1; python_version >= '3.13'
 characteristic==14.3.0
-constantly==15.1.0
+constantly==23.10.4
 hyperlink==21.0.0
 incremental==22.10.0; python_version <= '3.7'
 incremental==24.7.2; python_version > '3.7'