Rename desiredCapabilities to firstMatch in DriverFactory

Renamed the variable `desiredCapabilities` to `firstMatch` in the
`DriverFactory.cs` file within the `G4.Abstraction.WebDriver` namespace.
This change is reflected in the retrieval from `driverParams` and the
assignment to the `FirstMatch` property of the `_sessionModel` object.
This improves naming consistency and code clarity.

Author: gravity-api

src/G4.Abstraction.WebDriver/DriverFactory.cs

@@ -88,13 +88,13 @@ public DriverFactory(IDictionary<string, object> driverParams)
 
             // Set capabilities using provided values or default to empty models
             var capabilities = driverParams.Find("capabilities", new CapabilitiesModel());
-            var desiredCapabilities = driverParams.Find("firstMatch", Enumerable.Empty<IDictionary<string, object>>());
+            var firstMatch = driverParams.Find("firstMatch", Enumerable.Empty<IDictionary<string, object>>());
 
             // Create and assign a new session model
             _sessionModel = new SessionModel
             {
                 Capabilities = capabilities,
-                FirstMatch = desiredCapabilities,
+                FirstMatch = firstMatch,
             };
         }
         #endregion