build: rename samples lint workflow to checkstyle to disambiguate bra…

…nch protection with unit lint (#772)

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Source-Link: googleapis/synthtool@8a7a302

.github/workflows/samples.yaml

@@ -2,7 +2,7 @@ on:
   pull_request:
 name: samples
 jobs:
-  lint:
+  checkstyle:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2

synth.metadata

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-bigquery.git",
-        "sha": "4c5bdadabcdb9b851e1fb7d718824409d39a2915"
+        "sha": "647a7d4be965562a711d8db031c004a86f1dec8f"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "e6168630be3e31eede633ba2c6f1cd64248dec1c"
+        "sha": "8a7a3021fe97aa0a3641db642fe2b767f1c8110f"
       }
     }
   ],