build(java): update autorelease branch name check (#364)

This PR was generated using Autosynth. 🌈

Synth log will be available here:
https://source.cloud.google.com/results/invocations/c9dc8a78-8116-4a14-8cbe-b5dd35bc453d/targets

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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

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-language.git",
-        "sha": "71635190c78a818c37d59bca1753107cf8d48a64"
+        "sha": "2ff7711bdb467fe9e0e64176efc80bfffdc84014"
       }
     },
     {
@@ -27,7 +27,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "e935c9ecb47da0f2e054f5f1845f7cf7c95fa625"
+        "sha": "140ba24a136c63e7f10a998a63e7898aed63ea7d"
       }
     }
   ],