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

…v6.66.0 (#1599)

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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) | `6.65.1` -> `6.66.0` | [![age](https://developer.mend.io/api/mc/badges/age/maven/com.google.cloud:google-cloud-spanner-bom/6.66.0?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/6.66.0?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/6.65.1/6.66.0?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/6.65.1/6.66.0?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>

### [`v6.66.0`](https://togithub.com/googleapis/java-spanner/blob/HEAD/CHANGELOG.md#6660-2024-05-03)

[Compare Source](https://togithub.com/googleapis/java-spanner/compare/v6.65.1...v6.66.0)

##### Features

-   Allow DDL with autocommit=false ([#&#8203;3057](https://togithub.com/googleapis/java-spanner/issues/3057)) ([22833ac](https://togithub.com/googleapis/java-spanner/commit/22833acf9f073271ce0ee10f2b496f3a1d39566a))
-   Include stack trace of checked out sessions in exception ([#&#8203;3092](https://togithub.com/googleapis/java-spanner/issues/3092)) ([ba6a0f6](https://togithub.com/googleapis/java-spanner/commit/ba6a0f644b6caa4d2f3aa130c6061341b70957dd))

##### Bug Fixes

-   Multiplexed session metrics were not included in refactor move ([#&#8203;3088](https://togithub.com/googleapis/java-spanner/issues/3088)) ([f3589c4](https://togithub.com/googleapis/java-spanner/commit/f3589c430b0e84933a91008bb306c26089788357))

##### Dependencies

-   Update dependency com.google.cloud:sdk-platform-java-config to v3.30.0 ([#&#8203;3082](https://togithub.com/googleapis/java-spanner/issues/3082)) ([ddfc98e](https://togithub.com/googleapis/java-spanner/commit/ddfc98e240fb47ef51075ba4461bf9a98aa25ce0))

</details>

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pom.xml

@@ -62,7 +62,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-spanner-bom</artifactId>
-        <version>6.65.1</version>
+        <version>6.66.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>