build(java): use yoshi-approver token for auto-approve (#359)

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Source-Link: googleapis/synthtool@916c10e

.github/workflows/auto-release.yaml

@@ -7,7 +7,7 @@ jobs:
     steps:
     - uses: actions/[email protected]
       with:
-        github-token: ${{secrets.GITHUB_TOKEN}}
+        github-token: ${{secrets.YOSHI_APPROVER_TOKEN}}
         debug: true
         script: |
           // only approve PRs from release-please[bot]
@@ -66,4 +66,4 @@ jobs:
             repo: context.repo.repo,
             issue_number: context.payload.pull_request.number,
             labels: ['kokoro:force-run', 'automerge']
-          });
+          });

synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-pubsub.git",
-        "sha": "caf8e967e06edc945291d79d95c45220f0ca7bc1"
+        "sha": "3b3616c524059fb8a87bf30a66c481000046132a"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "80003a3de2d8a75f5b47cb2e77e018f7f0f776cc"
+        "sha": "916c10e8581804df2b48a0f0457d848f3faa582e"
       }
     }
   ],