Fix required Spring Framework version

spring-boot-docs/src/main/asciidoc/getting-started.adoc

@@ -37,7 +37,7 @@ diverge from the defaults.
 [[getting-started-system-requirements]]
 == System Requirements
 Spring Boot {spring-boot-version} requires http://www.java.com[Java 6] and Spring
-Framework 4.2.3 or above. Explicit build support is provided for Maven (3.2+) and
+Framework 4.1.3 or above. Explicit build support is provided for Maven (3.2+) and
 Gradle (1.12+).
 
 TIP: Although you can use Spring Boot with Java 6, we generally recommend Java 8 if at