Update jss-rtl requirement from ^0.2.1 to ^0.2.3 in /docs (#33)

Updates the requirements on [jss-rtl](https://github.com/alitaheri/jss-rtl) to permit the latest version.
- [Release notes](https://github.com/alitaheri/jss-rtl/releases)
- [Commits](alitaheri/jss-rtl@v0.2.1...v0.2.3)

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

docs/package.json

@@ -56,7 +56,7 @@
     "isomorphic-fetch": "^2.2.1",
     "json2mq": "^0.2.0",
     "jss-plugin-template": "10.0.0-alpha.17",
-    "jss-rtl": "^0.2.1",
+    "jss-rtl": "^0.2.3",
     "lodash": "^4.17.15",
     "lz-string": "^1.4.4",
     "markdown-to-jsx": "^6.8.3",