deps: update dependency com.google.cloud:google-cloud-bigquery to v2.14.6 (#891)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-bigquery](https://github.com/googleapis/java-bigquery) | `2.14.3` -> `2.14.6` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-bigquery/2.14.6/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-bigquery/2.14.6/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-bigquery/2.14.6/compatibility-slim/2.14.3)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-bigquery/2.14.6/confidence-slim/2.14.3)](https://docs.renovatebot.com/merge-confidence/) |

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samples/snapshot/pom.xml

@@ -58,7 +58,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-bigquery</artifactId>
-      <version>2.14.3</version>
+      <version>2.14.6</version>
       <scope>test</scope>
     </dependency>
   </dependencies>