deps: update dependency org.springframework.boot:spring-boot-starter-data-jdbc to v4.0.3 (#2404)

This PR contains the following updates:

| Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Adoption](https://docs.renovatebot.com/merge-confidence/) | [Passing](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|---|---|
| [org.springframework.boot:spring-boot-starter-data-jdbc](https://spring.io/projects/spring-boot) ([source](https://redirect.github.com/spring-projects/spring-boot)) | `4.0.2` → `4.0.3` | ![age](https://developer.mend.io/api/mc/badges/age/maven/org.springframework.boot:spring-boot-starter-data-jdbc/4.0.3?slim=true) | ![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/org.springframework.boot:spring-boot-starter-data-jdbc/4.0.3?slim=true) | ![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/org.springframework.boot:spring-boot-starter-data-jdbc/4.0.2/4.0.3?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/org.springframework.boot:spring-boot-starter-data-jdbc/4.0.2/4.0.3?slim=true) |

---

### Release Notes

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

### [`v4.0.3`](https://redirect.github.com/spring-projects/spring-boot/compare/v4.0.2...v4.0.3)

[Compare Source](https://redirect.github.com/spring-projects/spring-boot/compare/v4.0.2...v4.0.3)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/). View the [repository job log](https://developer.mend.io/github/googleapis/java-spanner-jdbc).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4yNS4xMSIsInVwZGF0ZWRJblZlciI6IjQzLjI1LjExIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Author: renovate-bot

java-spanner-jdbc/samples/spring-data-jdbc/googlesql/pom.xml

@@ -59,7 +59,7 @@
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-data-jdbc</artifactId>
-      <version>4.0.2</version>
+      <version>4.0.3</version>
     </dependency>
 
     <!-- Add the Spanner JDBC driver. -->

java-spanner-jdbc/samples/spring-data-jdbc/postgresql/pom.xml

@@ -59,7 +59,7 @@
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-data-jdbc</artifactId>
-      <version>4.0.2</version>
+      <version>4.0.3</version>
     </dependency>
 
     <!-- Add both the Cloud Spanner and the PostgreSQL JDBC driver. -->