[py] Fix default rpId in virtual authenticator

Author: cgoldberg

py/selenium/webdriver/common/virtual_authenticator.py

@@ -180,7 +180,7 @@ def to_dict(self) -> dict[str, Any]:
     def from_dict(cls, data: dict[str, Any]) -> "Credential":
         _id = urlsafe_b64decode(f"{data['credentialId']}==")
         is_resident_credential = bool(data["isResidentCredential"])
-        rp_id = data["rpId"]
+        rp_id = data.get("rpId", None)
         private_key = urlsafe_b64decode(f"{data['privateKey']}==")
         sign_count = int(data["signCount"])
         user_handle = urlsafe_b64decode(f"{data['userHandle']}==") if data.get("userHandle", None) else None