Update spring core to v6

renovate[bot] · web-flow · commit f111d96e1125 · 2023-05-12T17:25:54.000Z
diff --git a/gradle.properties b/gradle.properties
@@ -27,7 +27,7 @@ seleniumVersion=3.14.0
 servletApiVersion=4.0.1
 spockVersion=2.1-groovy-3.0
 springBootVersion=2.7.11
-springVersion=5.3.20
+springVersion=6.0.9
 webdriverBinariesVersion=1.4
 
 org.gradle.caching=true
