Bump sphinx-jsonschema from 1.16.2 to 1.16.3

Bumps [sphinx-jsonschema](https://github.com/lnoor/sphinx-jsonschema) from 1.16.2 to 1.16.3.
- [Release notes](https://github.com/lnoor/sphinx-jsonschema/releases)
- [Commits](lnoor/sphinx-jsonschema@v1.16.2...v1.16.3)

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

docs/requirements.txt

@@ -1,6 +1,6 @@
 pygments
 Sphinx>=2.0.0
 sphinx-intl==2.0.1
-sphinx-jsonschema==1.16.2
+sphinx-jsonschema==1.16.3
 sphinx-rtd-theme==0.5.0
 sphinxcontrib-httpdomain==1.7.0