chore(deps): update dependency com.google.cloud:google-cloud-spanner-jdbc to v2.33.3 (#2274)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-spanner-jdbc](https://redirect.github.com/googleapis/java-spanner-jdbc) | `2.33.2` -> `2.33.3` | [![age](https://developer.mend.io/api/mc/badges/age/maven/com.google.cloud:google-cloud-spanner-jdbc/2.33.3?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/2.33.3?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/2.33.2/2.33.3?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/2.33.2/2.33.3?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>

### [`v2.33.3`](https://redirect.github.com/googleapis/java-spanner-jdbc/blob/HEAD/CHANGELOG.md#2333-2025-10-28)

[Compare Source](https://redirect.github.com/googleapis/java-spanner-jdbc/compare/v2.33.2...v2.33.3)

##### Bug Fixes

- Run DatabaseMetadata tests for PG on emulator ([#&#8203;2271](https://redirect.github.com/googleapis/java-spanner-jdbc/issues/2271)) ([e7b20eb](https://redirect.github.com/googleapis/java-spanner-jdbc/commit/e7b20ebd0ec1554e969c9097c1d5b7c5b6dcc232))

</details>

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Author: renovate-bot

samples/install-without-bom/pom.xml

@@ -29,7 +29,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-spanner-jdbc</artifactId>
-      <version>2.33.2</version>
+      <version>2.33.3</version>
     </dependency>
     <!-- [END spanner-jdbc_install_without_bom] -->