Link to current version of Spring Framework's reference documentation

Closes gh-853

build.gradle

@@ -28,7 +28,6 @@ nohttp {
 }
 
 ext {
-	springFrameworkVersion = "6.0.0-M5"
 	javadocLinks = [
 		"https://docs.spring.io/spring-framework/docs/$springFrameworkVersion/javadoc-api/",
 		"https://docs.jboss.org/hibernate/validator/7.0/api/",

docs/build.gradle

@@ -48,6 +48,7 @@ asciidoctor {
 		include "index.adoc"
 	}
 	attributes	"revnumber": project.version,
+				"spring-Framework-version": springFrameworkVersion,
 				"branch-or-tag": project.version.endsWith("SNAPSHOT") ? "main": "v${project.version}"
 	inputs.files(sourceSets.test.java)
 	outputOptions {

docs/src/docs/asciidoc/index.adoc

@@ -13,8 +13,8 @@ Andy Wilkinson; Jay Bryant
 :samples: https://github.com/spring-projects/spring-restdocs-samples/tree/main
 :templates: {source}spring-restdocs/src/main/resources/org/springframework/restdocs/templates
 :spring-boot-docs: https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle
-:spring-framework-docs: https://docs.spring.io/spring-framework/docs/5.0.x/spring-framework-reference
-:spring-framework-api: https://docs.spring.io/spring-framework/docs/5.0.x/javadoc-api
+:spring-framework-docs: https://docs.spring.io/spring-framework/docs/{spring-framework-version}/reference/html/
+:spring-framework-api: https://docs.spring.io/spring-framework/docs/{spring-framework-version}/javadoc-api
 
 [[abstract]]
 

gradle.properties

@@ -6,3 +6,4 @@ org.gradle.parallel=true
 
 javaFormatVersion=0.0.34
 jmustacheVersion=1.15
+springFrameworkVersion=6.0.0-M5