chore: Update UTP adapter dependencies (#1615)

Author: simon-lemay-unity

com.unity.netcode.adapter.utp/CHANGELOG.md

@@ -11,6 +11,8 @@ All notable changes to this package will be documented in this file. The format
 ### Changed
 
 - Rename the 'Send Queue Batch Size' property to 'Max Payload Size' to better reflect its usage (#1584)
+- Updated Unity Transport package to 1.0.0-pre.12. (#1615)
+- Updated Burst package to 1.6.4. (#1615)
 
 ### Fixed
 

com.unity.netcode.adapter.utp/package.json

@@ -5,8 +5,8 @@
   "version": "1.0.0-pre.4",
   "unity": "2020.3",
   "dependencies": {
-    "com.unity.burst": "1.6.2",
+    "com.unity.burst": "1.6.4",
     "com.unity.netcode.gameobjects": "1.0.0-pre.4",
-    "com.unity.transport": "1.0.0-pre.10"
+    "com.unity.transport": "1.0.0-pre.12"
   }
 }