build(deps-dev): Bump @wdio/spec-reporter from 8.20.0 to 8.21.0 (#1012)

Bumps [@wdio/spec-reporter](https://github.com/webdriverio/webdriverio/tree/HEAD/packages/wdio-spec-reporter) from 8.20.0 to 8.21.0.
- [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/v8.21.0/packages/wdio-spec-reporter)

---
updated-dependencies:
- dependency-name: "@wdio/spec-reporter"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -23,7 +23,7 @@
     "@wdio/mocha-framework": "^8.21.0",
     "@wdio/selenium-standalone-service": "^8.15.0",
     "wdio-selenium-standalone-service": "^0.0.12",
-    "@wdio/spec-reporter": "^8.20.0",
+    "@wdio/spec-reporter": "^8.21.0",
     "axe-core": "^4.8.2",
     "axios": "^1.6.1",
     "ejs": "^3.1.9",