build(deps-dev): bump web-ext from 5.4.1 to 5.5.0 in /addon

Bumps [web-ext](https://github.com/mozilla/web-ext) from 5.4.1 to 5.5.0.
- [Release notes](https://github.com/mozilla/web-ext/releases)
- [Commits](mozilla/web-ext@5.4.1...5.5.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

addon/package-lock.json

@@ -11,7 +11,7 @@
   "devDependencies": {
     "eslint-plugin-mozilla": "^0.9.0",
     "eslint-plugin-no-unsanitized": "^3.1.4",
-    "web-ext": "^5.4.1",
+    "web-ext": "^5.5.0",
     "webpack": "^5.11.0",
     "webpack-cli": "^4.2.0"
   },