deps: update dependency com.google.cloud:google-cloud-spanner-bom to v6.67.0 (#1613)

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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) | `6.66.0` -> `6.67.0` | [![age](https://developer.mend.io/api/mc/badges/age/maven/com.google.cloud:google-cloud-spanner-bom/6.67.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/com.google.cloud:google-cloud-spanner-bom/6.67.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/com.google.cloud:google-cloud-spanner-bom/6.66.0/6.67.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/com.google.cloud:google-cloud-spanner-bom/6.66.0/6.67.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v6.67.0`](https://togithub.com/googleapis/java-spanner/blob/HEAD/CHANGELOG.md#6670-2024-05-22)

[Compare Source](https://togithub.com/googleapis/java-spanner/compare/v6.66.0...v6.67.0)

##### Features

-   Add tracing for batchUpdate, executeUpdate, and connections ([#&#8203;3097](https://togithub.com/googleapis/java-spanner/issues/3097)) ([45cdcfc](https://togithub.com/googleapis/java-spanner/commit/45cdcfcde02aa7976b017a90f81c2ccd28658c8f))

##### Performance Improvements

-   Minor optimizations to the standard query path ([#&#8203;3101](https://togithub.com/googleapis/java-spanner/issues/3101)) ([ec820a1](https://togithub.com/googleapis/java-spanner/commit/ec820a16e2b3cb1a12a15231491b75cd73afaa13))

##### Dependencies

-   Update dependency com.google.cloud:google-cloud-monitoring to v3.44.0 ([#&#8203;3099](https://togithub.com/googleapis/java-spanner/issues/3099)) ([da44e93](https://togithub.com/googleapis/java-spanner/commit/da44e932a39ac0124b63914f8ea926998c10ea2e))
-   Update dependency com.google.cloud:sdk-platform-java-config to v3.30.1 ([#&#8203;3116](https://togithub.com/googleapis/java-spanner/issues/3116)) ([d205a73](https://togithub.com/googleapis/java-spanner/commit/d205a73714786a609673012b771e7a0722b3e1f2))

</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>6.66.0</version>
+        <version>6.67.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>