Bump validators from 0.21.0 to 0.21.2 (#16)

Bumps [validators](https://github.com/python-validators/validators) from 0.21.0 to 0.21.2.
- [Release notes](https://github.com/python-validators/validators/releases)
- [Changelog](https://github.com/python-validators/validators/blob/master/CHANGES.md)
- [Commits](python-validators/validators@0.21.0...0.21.2)

---
updated-dependencies:
- dependency-name: validators
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -2,4 +2,4 @@ pytest~=7.4.0
 PyYAML~=6.0
 rdflib~=7.0.0
 toml~=0.10.2
-validators~=0.20.0
+validators>=0.20,<0.22