Update spring boot to v2.7.9 (#12885)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle.properties

@@ -37,7 +37,7 @@ scaffoldingCoreVersion=2.1.0
 servletApiVersion=4.0.1
 slf4jVersion=1.7.36
 spockVersion=2.1-groovy-3.0
-springBootVersion=2.7.8
+springBootVersion=2.7.9
 springLoadedVersion=1.2.8.RELEASE
 springVersion=5.3.25
 testingSupportVersion=2.4.1