Bump springBootVersion from 2.7.8 to 2.7.9

Bumps `springBootVersion` from 2.7.8 to 2.7.9.

Updates `org.springframework.boot:spring-boot-starter` from 2.7.8 to 2.7.9
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.8...v2.7.9)

Updates `org.springframework.boot:spring-boot-configuration-processor` from 2.7.8 to 2.7.9
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.8...v2.7.9)

Updates `org.springframework.boot:spring-boot-starter-test` from 2.7.8 to 2.7.9
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.8...v2.7.9)

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

Signed-off-by: dependabot[bot] <support@github.com>

dependencies.gradle

@@ -25,7 +25,7 @@ ext {
     junitDepVersion     = "4.11.20120805.1225"
     junitVersion        = "4.13.2"
     log4j2Version       = "2.19.0"
-    springBootVersion   = "2.7.8" // Spring Boot 3.0 requires Java 17 as a minimum version
+    springBootVersion   = "2.7.9" // Spring Boot 3.0 requires Java 17 as a minimum version
     systemRulesVersion  = "1.19.0"
     systemLambdaVersion = '1.2.1'
     junit5Version       = '5.9.2'