Bump react-markdown from 5.0.2 to 5.0.3

Bumps [react-markdown](https://github.com/remarkjs/react-markdown) from 5.0.2 to 5.0.3.
- [Release notes](https://github.com/remarkjs/react-markdown/releases)
- [Changelog](https://github.com/remarkjs/react-markdown/blob/main/changelog.md)
- [Commits](https://github.com/remarkjs/react-markdown/compare/5.0.2...5.0.3)

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

web/package.json

@@ -19,7 +19,7 @@
     "react-chartkick": "^0.4.1",
     "react-dom": "16.13.1",
     "react-linkify": "^1.0.0-alpha",
-    "react-markdown": "^5.0.2",
+    "react-markdown": "^5.0.3",
     "sass": "^1.26.11"
   },
   "devDependencies": {