webdriver: WebKitWebDriver: set correct browsername to avoid Failed to match capabilities

[bukowa]

fixes tauri-apps/tauri#8828

This is really annoying, with previous wry example:

1. Edgedriver doesn't care.
2. WebKitWebDriver fails with Failed to match capabilities.
3. Selenium won't allow undefined.

P.S WebKitWebDriver can run with bundled MiniBrowser if you set browserName to MiniBrowser

[netlify]

✅ Deploy Preview for tauri-v1 ready!

Name	Link
🔨 Latest commit	fe45283
🔍 Latest deploy log	https://app.netlify.com/sites/tauri-v1/deploys/667d1fceaee8260008e88cc7
😎 Deploy Preview	https://deploy-preview-2340--tauri-v1.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[bukowa]

This only happens in v1 but it doesn't matter as v1 won't work (prove me wrong) with newest webkitdriver anyway.
In v2 wry is required to match capabilities.