Polish "Reference the latest version of the jOOQ manual"

Closes gh-13262

spring-boot-docs/pom.xml

@@ -1009,6 +1009,7 @@
 									<doctype>book</doctype>
 									<attributes>
 										<docinfo>true</docinfo>
+										<jooq-version>${jooq.version}</jooq-version>
 										<spring-version>${spring.version}</spring-version>
 										<spring-boot-version>${project.version}</spring-boot-version>
 										<spring-boot-docs-version>${project.version}</spring-boot-docs-version>

spring-boot-docs/src/main/asciidoc/index.adoc

@@ -52,6 +52,7 @@ Phillip Webb; Dave Syer; Josh Long; Stéphane Nicoll; Rob Winch; Andy Wilkinson;
 :test-examples: ../../test/java/org/springframework/boot
 :gradle-user-guide: https://docs.gradle.org/2.14.1/userguide
 :gradle-dsl: https://docs.gradle.org/2.14.1/dsl
+:jooq-manual: https://www.jooq.org/doc/{jooq-version}/manual-single-page
 // ======================================================================================
 
 include::documentation-overview.adoc[]

spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -3210,11 +3210,11 @@ commercial and open source editions can be used with Spring Boot.
 ==== Code Generation
 In order to use jOOQ type-safe queries, you need to generate Java classes from your
 database schema. You can follow the instructions in the
-https://www.jooq.org/doc/latest/manual-single-page/#jooq-in-7-steps-step3[jOOQ user manual].
-If you are using the `jooq-codegen-maven` plugin (and you also use the
-`spring-boot-starter-parent` "`parent POM`") you can safely omit the plugin's `<version>`
-tag. You can also use Spring Boot defined version variables (e.g. `h2.version`) to
-declare the plugin's database dependency. Here's an example:
+{jooq-manual}/#jooq-in-7-steps-step3[jOOQ user manual]. If you are using the
+`jooq-codegen-maven` plugin (and you also use the `spring-boot-starter-parent`
+"`parent POM`") you can safely omit the plugin's `<version>` tag. You can also use Spring
+Boot defined version variables (e.g. `h2.version`) to declare the plugin's database
+dependency. Here's an example:
 
 [source,xml,indent=0]
 ----