deps: update dependency com.google.cloud:google-cloud-spanner-jdbc to…

… v2.14.6 (#6315)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-spanner-jdbc](https://togithub.com/googleapis/java-spanner-jdbc) | `2.14.5` -> `2.14.6` | [![age](https://developer.mend.io/api/mc/badges/age/maven/com.google.cloud:google-cloud-spanner-jdbc/2.14.6?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/com.google.cloud:google-cloud-spanner-jdbc/2.14.6?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/com.google.cloud:google-cloud-spanner-jdbc/2.14.5/2.14.6?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/com.google.cloud:google-cloud-spanner-jdbc/2.14.5/2.14.6?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/java-spanner-jdbc (com.google.cloud:google-cloud-spanner-jdbc)</summary>

### [`v2.14.6`](https://togithub.com/googleapis/java-spanner-jdbc/blob/HEAD/CHANGELOG.md#2146-2023-12-04)

[Compare Source](https://togithub.com/googleapis/java-spanner-jdbc/compare/v2.14.5...v2.14.6)

##### Dependencies

-   Update dependency com.google.cloud:google-cloud-spanner-bom to v6.55.0 ([#&#8203;1434](https://togithub.com/googleapis/java-spanner-jdbc/issues/1434)) ([4168611](https://togithub.com/googleapis/java-spanner-jdbc/commit/4168611a973f3cd35a4cb1ce56d0eefe5e1dd571))

</details>

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google-cloud-bom/pom.xml

@@ -245,7 +245,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-spanner-jdbc</artifactId>
-        <version>2.14.5</version>
+        <version>2.14.6</version>
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>