chore(deps): update upm project dependency com.unity.services.authentication to v3

Author: unity-renovate[bot]

testproject/Packages/manifest.json

@@ -8,7 +8,7 @@
     "com.unity.mathematics": "1.2.6",
     "com.unity.netcode.gameobjects": "file:../../com.unity.netcode.gameobjects",
     "com.unity.package-validation-suite": "0.49.0-preview",
-    "com.unity.services.authentication": "2.7.4",
+    "com.unity.services.authentication": "3.4.0",
     "com.unity.services.core": "1.14.0",
     "com.unity.services.relay": "1.0.5",
     "com.unity.test-framework": "1.3.3",