deps: update dependency com.google.cloud:google-cloud-spanner-jdbc to v2.9.3 (#5779)

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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) | `2.9.2` -> `2.9.3` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-spanner-jdbc/2.9.3/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-spanner-jdbc/2.9.3/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-spanner-jdbc/2.9.3/compatibility-slim/2.9.2)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-spanner-jdbc/2.9.3/confidence-slim/2.9.2)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/java-spanner-jdbc</summary>

### [`v2.9.3`](https://togithub.com/googleapis/java-spanner-jdbc/blob/HEAD/CHANGELOG.md#&#8203;293-httpsgithubcomgoogleapisjava-spanner-jdbccomparev292v293-2023-01-25)

[Compare Source](https://togithub.com/googleapis/java-spanner-jdbc/compare/v2.9.2...v2.9.3)

##### Bug Fixes

-   **java:** Skip fixing poms for special modules ([#&#8203;1744](https://togithub.com/googleapis/java-spanner-jdbc/issues/1744)) ([#&#8203;1108](https://togithub.com/googleapis/java-spanner-jdbc/issues/1108)) ([2915d76](https://togithub.com/googleapis/java-spanner-jdbc/commit/2915d766bf6578f1921f8ffe38d6b9be61c63813))

##### Dependencies

-   Update dependency com.google.cloud:google-cloud-shared-dependencies to v3.1.2 ([#&#8203;1109](https://togithub.com/googleapis/java-spanner-jdbc/issues/1109)) ([3614824](https://togithub.com/googleapis/java-spanner-jdbc/commit/3614824692899165d38ffd12de8cf3543560ea5c))
-   Update dependency com.google.cloud:google-cloud-spanner-bom to v6.35.1 ([#&#8203;1106](https://togithub.com/googleapis/java-spanner-jdbc/issues/1106)) ([3bd7d6b](https://togithub.com/googleapis/java-spanner-jdbc/commit/3bd7d6b72ee87b3b83a50e2459f2d4e3b0fd87a2))

</details>

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Author: renovate-bot

google-cloud-bom/pom.xml

@@ -245,7 +245,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-spanner-jdbc</artifactId>
-        <version>2.9.2</version>
+        <version>2.9.3</version>
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>