Bump djlint from 1.19.17 to 1.21.0

Bumps [djlint](https://github.com/Riverside-Healthcare/djlint) from 1.19.17 to 1.21.0.
- [Release notes](https://github.com/Riverside-Healthcare/djlint/releases)
- [Changelog](https://github.com/Riverside-Healthcare/djLint/blob/master/.releaserc)
- [Commits](djlint/djLint@v1.19.17...v1.21.0)

---
updated-dependencies:
- dependency-name: djlint
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

linter-requirements.txt

@@ -3,4 +3,4 @@ black==23.3.0
 flake8==6.0.0
 isort==5.12.0
 pydocstyle[toml]==6.3.0
-djlint==1.19.17
+djlint==1.21.0