Bump org.springframework.boot from 3.1.3 to 3.1.5 in /java/gradle (#637)

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.1.3 to 3.1.5.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.3...v3.1.5)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Daniel Mikusa <[email protected]>

Author: dependabot[bot]

java/gradle/build.gradle

@@ -1,6 +1,6 @@
 plugins {
 	id 'java'
-	id 'org.springframework.boot' version '3.1.3'
+	id 'org.springframework.boot' version '3.1.5'
 	id 'io.spring.dependency-management' version '1.1.3'
 }