build(deps): bump invenio-theme from 2.1.2 to 2.2.0

Bumps [invenio-theme](https://github.com/inveniosoftware/invenio-theme) from 2.1.2 to 2.2.0.
- [Release notes](https://github.com/inveniosoftware/invenio-theme/releases)
- [Changelog](https://github.com/inveniosoftware/invenio-theme/blob/master/CHANGES.rst)
- [Commits](inveniosoftware/invenio-theme@v2.1.2...v2.2.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -16,7 +16,7 @@ invenio-oauthclient==3.1.2
 invenio-pidstore==1.3.1
 invenio-records==2.1.0
 invenio-search[opensearch2]==2.2.0
-invenio-theme==2.1.2
+invenio-theme==2.2.0
 invenio-userprofiles==2.2.1
 python-twitter-v2==0.8.1
 responses==0.23.1