Update spring core to v6

renovate[bot] · web-flow · commit 263aafc2afad · 2023-05-23T20:39:45.000Z
diff --git a/gradle.properties b/gradle.properties
@@ -25,7 +25,7 @@ seleniumVersion=3.14.0
 servletApiVersion=4.0.1
 spockVersion=2.1-groovy-3.0
 springBootVersion=2.7.12
-springVersion=5.3.20
+springVersion=6.0.9
 
 org.gradle.caching=true
 org.gradle.daemon=true
