ci(deps-dev): bump reveal.js from 3.6.0 to 4.3.1

Bumps [reveal.js](https://github.com/hakimel/reveal.js) from 3.6.0 to 4.3.1.
- [Release notes](https://github.com/hakimel/reveal.js/releases)
- [Commits](https://github.com/hakimel/reveal.js/compare/3.6.0...4.3.1)

---
updated-dependencies:
- dependency-name: reveal.js
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

packages/app/package.json

@@ -234,7 +234,7 @@
     "react-waypoint": "^10.1.0",
     "reactstrap": "^8.9.0",
     "replacestream": "^4.0.3",
-    "reveal.js": "^3.5.0",
+    "reveal.js": "^4.3.1",
     "sass": "^1.43.4",
     "sass-loader": "^10.1.1",
     "simple-load-script": "^1.0.2",

yarn.lock

@@ -17878,9 +17878,10 @@ reusify@^1.0.0:
   resolved "https://registry.yarnpkg.com/reusify/-/reusify-1.0.4.tgz#90da382b1e126efc02146e90845a88db12925d76"
   integrity sha512-U9nH88a3fc/ekCF1l0/UP1IosiuIjyTh7hBvXVMHYgVcfGvt897Xguj2UOLDeI5BG2m7/uwyaLVT6fbtCwTyzw==
 
-reveal.js@^3.5.0:
-  version "3.6.0"
-  resolved "https://registry.yarnpkg.com/reveal.js/-/reveal.js-3.6.0.tgz#ce0e64f30cbebd6e5ce885c2f384085c5e5821e8"
+reveal.js@^4.3.1:
+  version "4.3.1"
+  resolved "https://registry.yarnpkg.com/reveal.js/-/reveal.js-4.3.1.tgz#24a63300cff92cf5cbdd40a46f5d3699614d49ca"
+  integrity sha512-1kyEnWeUkaCdBdX//XXq9dtBK95ppvIlSwlHelrP8/wrX6LcsYp4HT9WTFoFEOUBfVqkm8C2aHQ367o+UKfcxw==
 
 rewire@^5.0.0:
   version "5.0.0"