chore(deps-dev): bump webdriverio from 9.12.5 to 9.21.0

Bumps [webdriverio](https://github.com/webdriverio/webdriverio/tree/HEAD/packages/webdriverio) from 9.12.5 to 9.21.0.
- [Release notes](https://github.com/webdriverio/webdriverio/releases)
- [Changelog](https://github.com/webdriverio/webdriverio/blob/main/CHANGELOG.md)
- [Commits](https://github.com/webdriverio/webdriverio/commits/v9.21.0/packages/webdriverio)

---
updated-dependencies:
- dependency-name: webdriverio
  dependency-version: 9.21.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -188,7 +188,7 @@
     "typedoc-plugin-markdown": "4.9.0",
     "typescript": "5.9.3",
     "wdio-docker-service": "3.2.1",
-    "webdriverio": "9.12.5",
+    "webdriverio": "9.21.0",
     "xml2js": "0.6.2",
     "xpath": "0.0.34"
   },