Bump xml2js and web-ext in /extension

Bumps [xml2js](https://github.com/Leonidas-from-XIV/node-xml2js) to 0.5.0 and updates ancestor dependency [web-ext](https://github.com/mozilla/web-ext). These dependencies need to be updated together.


Updates `xml2js` from 0.4.23 to 0.5.0
- [Release notes](https://github.com/Leonidas-from-XIV/node-xml2js/releases)
- [Commits](https://github.com/Leonidas-from-XIV/node-xml2js/commits/0.5.0)

Updates `web-ext` from 7.5.0 to 7.6.1
- [Release notes](https://github.com/mozilla/web-ext/releases)
- [Commits](https://github.com/mozilla/web-ext/compare/7.5.0...7.6.1)

---
updated-dependencies:
- dependency-name: xml2js
  dependency-type: indirect
- dependency-name: web-ext
  dependency-type: direct:development
...

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

extension/package.json

@@ -21,7 +21,7 @@
         "ts-loader": "^9.2.8",
         "typescript": "^4.6.3",
         "uuid": "^8.3.2",
-        "web-ext": "^7.5.0",
+        "web-ext": "^7.6.1",
         "yargs": "^17.5.1"
     }
 }