Bump webpack from 5.38.1 to 5.39.0 in /samples/web-extension/javascript

Bumps [webpack](https://github.com/webpack/webpack) from 5.38.1 to 5.39.0.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v5.38.1...v5.39.0)

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

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

Author: dependabot[bot]

samples/web-extension/javascript/package-lock.json

@@ -18,7 +18,7 @@
   "devDependencies": {
     "mocha": "^9.0.0",
     "typescript": "^4.3.2",
-    "webpack": "^5.38.1",
+    "webpack": "^5.39.0",
     "webpack-cli": "^4.7.2"
   }
 }