Bump spring-boot.version from 4.0.2 to 4.0.3 (#569)

Bumps `spring-boot.version` from 4.0.2 to 4.0.3.

Updates `org.springframework.boot:spring-boot-starter-validation` from 4.0.2 to 4.0.3
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v4.0.2...v4.0.3)

Updates `org.springframework.boot:spring-boot-starter-test` from 4.0.2 to 4.0.3
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v4.0.2...v4.0.3)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter-validation
  dependency-version: 4.0.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot:spring-boot-starter-test
  dependency-version: 4.0.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pom.xml

@@ -19,7 +19,7 @@
 
 	<properties>
 		<java.version>17</java.version>
-		<spring-boot.version>4.0.2</spring-boot.version>
+		<spring-boot.version>4.0.3</spring-boot.version>
 		<spring-cloud.version>2021.0.0</spring-cloud.version>
 		<springdoc-openapi.version>1.8.0</springdoc-openapi.version>
 		<lombok.version>1.18.42</lombok.version>