Bump react-markdown from 6.0.2 to 6.0.3 (#266)

Bumps [react-markdown](https://github.com/remarkjs/react-markdown) from 6.0.2 to 6.0.3.
- [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/6.0.2...6.0.3)

---
updated-dependencies:
- dependency-name: react-markdown
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

web/package.json

@@ -23,7 +23,7 @@
     "react-chartkick": "^0.5.0",
     "react-dom": "^17.0.2",
     "react-linkify": "^1.0.0-alpha",
-    "react-markdown": "^6.0.2",
+    "react-markdown": "^6.0.3",
     "react-markdown-editor-lite": "^1.3.0",
     "sass": "^1.36.0",
     "ua-parser-js": "^0.7.28"