chore(deps): update upm project dependency com.unity.transport to v2.6.0

Author: unity-renovate[bot]

testproject-tools-integration/Packages/manifest.json

@@ -6,7 +6,7 @@
     "com.unity.netcode.gameobjects": "file:../../com.unity.netcode.gameobjects",
     "com.unity.test-framework": "1.4.6",
     "com.unity.test-framework.performance": "3.1.0",
-    "com.unity.transport": "2.5.3",
+    "com.unity.transport": "2.6.0",
     "com.unity.modules.ai": "1.0.0",
     "com.unity.modules.androidjni": "1.0.0",
     "com.unity.modules.animation": "1.0.0",