Bump spring-boot-starter-parent from 2.5.11 to 2.5.12 (#1041)

Bumps [spring-boot-starter-parent](https://github.com/spring-projects/spring-boot) from 2.5.11 to 2.5.12.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.5.11...v2.5.12)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter-parent
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

spring-cloud-gcp-samples/pom.xml

@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.5.11</version>
+		<version>2.5.12</version>
 		<relativePath/>
 	</parent>