deps: update dependency com.google.cloud:google-cloud-spanner-bom to v6.35.2 (#1114)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-spanner-bom](https://togithub.com/googleapis/java-spanner) | `6.35.1` -> `6.35.2` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-spanner-bom/6.35.2/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-spanner-bom/6.35.2/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-spanner-bom/6.35.2/compatibility-slim/6.35.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-spanner-bom/6.35.2/confidence-slim/6.35.1)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v6.35.2`](https://togithub.com/googleapis/java-spanner/blob/HEAD/CHANGELOG.md#&#8203;6352-httpsgithubcomgoogleapisjava-spannercomparev6351v6352-2023-01-24)

[Compare Source](https://togithub.com/googleapis/java-spanner/compare/v6.35.1...v6.35.2)

##### Dependencies

-   Update dependency com.google.cloud:google-cloud-monitoring to v3.10.0 ([#&#8203;2249](https://togithub.com/googleapis/java-spanner/issues/2249)) ([d18780e](https://togithub.com/googleapis/java-spanner/commit/d18780ec0278fc49495939647fe6a2f9e0b4f94e))
-   Update dependency com.google.cloud:google-cloud-shared-dependencies to v3.1.2 ([#&#8203;2246](https://togithub.com/googleapis/java-spanner/issues/2246)) ([1adaf7c](https://togithub.com/googleapis/java-spanner/commit/1adaf7cae629ba7b9903d6512adc7b13b6d1208e))
-   Update dependency com.google.cloud:google-cloud-trace to v2.9.0 ([#&#8203;2250](https://togithub.com/googleapis/java-spanner/issues/2250)) ([3cd5ab0](https://togithub.com/googleapis/java-spanner/commit/3cd5ab05e1fd24090fd58c2320b6875135e49b69))

</details>

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Author: renovate-bot

pom.xml

@@ -62,7 +62,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-spanner-bom</artifactId>
-        <version>6.35.1</version>
+        <version>6.35.2</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>