build(java): update autorelease title check in response to the new mu…

…lti release branch changes (#384)

This PR was generated using Autosynth. 🌈

Synth log will be available here:
https://source.cloud.google.com/results/invocations/50a12256-ca5e-4f80-a8f2-ba3c4ab12a2c/targets

- [ ] To automatically regenerate this PR, check this box.

Source-Link: googleapis/synthtool@0b064d7

.github/workflows/auto-release.yaml

@@ -16,8 +16,8 @@ jobs:
             return;
           }
 
-          // only approve PRs like "chore(master): release <release version>"
-          if ( !context.payload.pull_request.title.startsWith("chore(master): release") ) {
+          // only approve PRs like "chore: release <release version>"
+          if ( !context.payload.pull_request.title.startsWith("chore: release") ) {
             return;
           }
 

synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-document-ai.git",
-        "sha": "4c5a3473f39957fa65e3e4eb3d11d38592a0c7b7"
+        "sha": "b074e0b4bf48b6b140cfe30158fde6a5a2ab1dfc"
       }
     },
     {
@@ -35,7 +35,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "d0bdade9a962042dc0f770cf631086f3db59b5b0"
+        "sha": "0b064d767537e0675fc053e53fca473c5c701fb8"
       }
     }
   ],