chore: bump webpack from 5.65.0 to 5.70.0 in /site (#428)

Bumps [webpack](https://github.com/webpack/webpack) from 5.65.0 to 5.70.0.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](https://github.com/webpack/webpack/compare/v5.65.0...v5.70.0)

---
updated-dependencies:
- dependency-name: webpack
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

site/package.json

@@ -70,7 +70,7 @@
     "ts-loader": "9.2.8",
     "ts-node": "10.7.0",
     "typescript": "4.6.2",
-    "webpack": "5.65.0",
+    "webpack": "5.70.0",
     "webpack-bundle-analyzer": "4.5.0",
     "webpack-cli": "4.9.1",
     "webpack-dev-server": "4.7.4",