Bump rdflib from 6.0.2 to 7.0.0

Bumps [rdflib](https://github.com/RDFLib/rdflib) from 6.0.2 to 7.0.0.
- [Release notes](https://github.com/RDFLib/rdflib/releases)
- [Changelog](https://github.com/RDFLib/rdflib/blob/main/CHANGELOG.md)
- [Commits](RDFLib/rdflib@6.0.2...7.0.0)

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

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

requirements.txt

@@ -22,7 +22,7 @@ pyparsing==3.0.6
 pyrsistent==0.18.1
 pytz-deprecation-shim==0.1.0.post0
 PyYAML==6.0
-rdflib==6.0.2
+rdflib==7.0.0
 requests==2.26.0
 Shapely==1.8.0
 six==1.16.0