…21.0 (#2217)

* chore(deps): update dependency com.google.cloud:libraries-bom to v26.21.0

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…data-jdbc to v3.5.6 (googleapis#2217)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [org.springframework.boot:spring-boot-starter-data-jdbc](https://spring.io/projects/spring-boot) ([source](https://redirect.github.com/spring-projects/spring-boot)) | `3.5.5` -> `3.5.6` | [![age](https://developer.mend.io/api/mc/badges/age/maven/org.springframework.boot:spring-boot-starter-data-jdbc/3.5.6?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/org.springframework.boot:spring-boot-starter-data-jdbc/3.5.6?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/org.springframework.boot:spring-boot-starter-data-jdbc/3.5.5/3.5.6?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/org.springframework.boot:spring-boot-starter-data-jdbc/3.5.5/3.5.6?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>spring-projects/spring-boot (org.springframework.boot:spring-boot-starter-data-jdbc)</summary>

### [`v3.5.6`](https://redirect.github.com/spring-projects/spring-boot/compare/v3.5.5...v3.5.6)

[Compare Source](https://redirect.github.com/spring-projects/spring-boot/compare/v3.5.5...v3.5.6)

</details>

---

### Configuration

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