Bump jinja2 from 2.11.3 to 3.0.3

Bumps [jinja2](https://github.com/pallets/jinja) from 2.11.3 to 3.0.3.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/main/CHANGES.rst)
- [Commits](pallets/jinja@2.11.3...3.0.3)

---
updated-dependencies:
- dependency-name: jinja2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

requirements/docs.txt

@@ -1,3 +1,3 @@
 sphinx==4.3.2
 sphinx-autobuild==0.6.0
-jinja2==2.11.3
+jinja2==3.0.3

requirements/rtd.txt

@@ -1,6 +1,6 @@
 sphinx==4.3.2
 sphinx-autobuild==0.6.0
-jinja2==2.11.3
+jinja2==3.0.3
 future==0.18.2
 raven==6.10.0
 pyzor==1.0.0