build(java): update autorelease branch name check (#624)

In response to the new multi release branch changes.

Source-Author: Stephanie Wang <stephaniewang526@users.noreply.github.com>
Source-Date: Wed Feb 3 15:06:07 2021 -0500
Source-Repo: googleapis/synthtool
Source-Sha: 140ba24a136c63e7f10a998a63e7898aed63ea7d
Source-Link: googleapis/synthtool@140ba24

.github/workflows/auto-release.yaml

@@ -17,7 +17,7 @@ jobs:
           }
 
           // only approve PRs like "chore: release <release version>"
-          if ( !context.payload.pull_request.title.startsWith("chore: release") ) {
+          if ( !context.payload.pull_request.title.startsWith("chore(master): release") ) {
             return;
           }
 

synth.metadata

@@ -11,7 +11,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-bigquerydatatransfer.git",
-        "sha": "1d1bf491f32ffc575aa304d0f11613b67ed8e2bb"
+        "sha": "f3565cb2056afe44811f5aae6a9c3d111e3e9f52"
       }
     },
     {
@@ -26,7 +26,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "e935c9ecb47da0f2e054f5f1845f7cf7c95fa625"
+        "sha": "140ba24a136c63e7f10a998a63e7898aed63ea7d"
       }
     }
   ],