Bump webargs from 8.4.0 to 8.6.0

Bumps [webargs](https://github.com/marshmallow-code/webargs) from 8.4.0 to 8.6.0.
- [Changelog](https://github.com/marshmallow-code/webargs/blob/dev/CHANGELOG.rst)
- [Commits](marshmallow-code/webargs@8.4.0...8.6.0)

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

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

requirements.txt

@@ -11,4 +11,4 @@ marshmallow==3.22.0
 pytest==8.3.3
 pytest-datadir==1.5.0
 rdflib==7.0.0
-webargs==8.4.0
+webargs==8.6.0