Upgrade to Spring Framework 6.2.3

Closes gh-1156

Author: bclozel

build.gradle

@@ -2,9 +2,9 @@ description = "Spring for GraphQL"
 
 ext {
 	moduleProjects = [project(":spring-graphql"), project(":spring-graphql-test")]
-	springFrameworkVersion = "6.2.1"
+	springFrameworkVersion = "6.2.3"
 	graphQlJavaVersion = "22.3"
-	springBootVersion = "3.4.0"
+	springBootVersion = "3.4.3"
 }
 
 subprojects {