build(deps): update xmltodict requirement from <0.13.1 to <0.14.3

Updates the requirements on [xmltodict](https://github.com/martinblech/xmltodict) to permit the latest version.
- [Changelog](https://github.com/martinblech/xmltodict/blob/master/CHANGELOG.md)
- [Commits](martinblech/xmltodict@v0.2...v0.14.2)

---
updated-dependencies:
- dependency-name: xmltodict
  dependency-type: direct:production
...

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

requirements.txt

@@ -121,7 +121,7 @@ whitenoise==6.6.0
 Brotli==1.1.0
 
 # Contribs
-xmltodict<0.13.1
+xmltodict<0.14.3
 inflection>=0.4.0
 jdcal==1.4.1
 mock<6.0.0