Bump Cinemachine to V3 in manifest

Author: windxu88

Tests/SRPTests/Projects/UniversalGraphicsTest_2D/Packages/manifest.json

@@ -4,7 +4,7 @@
   "dependencies": {
     "com.unity.2d.sprite": "1.0.0",
     "com.unity.2d.tilemap": "1.0.0",
-    "com.unity.cinemachine": "2.10.7",
+    "com.unity.cinemachine": "3.1.6",
     "com.unity.ext.nunit": "1.0.0",
     "com.unity.external.test-protocol": "2.0.0-exp.2",
     "com.unity.feature.2d": "file:../../../../../Packages/com.unity.feature.2d",