Bump org.springframework.boot.version from 2.7.7 to 2.7.8

Bumps `org.springframework.boot.version` from 2.7.7 to 2.7.8.

Updates `spring-boot-dependencies` from 2.7.7 to 2.7.8
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.7...v2.7.8)

Updates `spring-boot-maven-plugin` from 2.7.7 to 2.7.8
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.7...v2.7.8)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

vaadin-addon-template-demo/pom.xml

@@ -37,7 +37,7 @@
 		<!-- Dependency-Versions -->
 		<vaadin.version>23.3.5</vaadin.version>
 
-		<org.springframework.boot.version>2.7.7</org.springframework.boot.version>
+		<org.springframework.boot.version>2.7.8</org.springframework.boot.version>
 	</properties>
 
 	<dependencyManagement>