build(deps-dev): bump web-ext from 8.8.0 to 8.9.0 (#1834)

Bumps [web-ext](https://github.com/mozilla/web-ext) from 8.8.0 to 8.9.0.
- [Release notes](https://github.com/mozilla/web-ext/releases)
- [Commits](mozilla/web-ext@8.8.0...8.9.0)

---
updated-dependencies:
- dependency-name: web-ext
  dependency-version: 8.9.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jonathan Kingston <jkingston@duckduckgo.com>

Author: dependabot[bot]

injected/package.json

@@ -44,6 +44,6 @@
     "@typescript-eslint/eslint-plugin": "^8.34.1",
     "fast-check": "^4.1.1",
     "jasmine": "^5.7.1",
-    "web-ext": "^8.8.0"
+    "web-ext": "^8.9.0"
   }
 }