Fix doc link to "RestClient customization"

Closes gh-1603

initializr-docs/pom.xml

@@ -176,7 +176,6 @@
 							<attributes>
 								<spring-initializr-version>${project.version}</spring-initializr-version>
 								<spring-initializr-docs-version>${project.version}</spring-initializr-docs-version>
-								<spring-boot-docs-version>${spring-boot.version}</spring-boot-docs-version>
 								<snippets>${snippets.location}</snippets>
 								<github-tag>${github-tag}</github-tag>
 								<sources-root>${project.basedir}/src</sources-root>

initializr-docs/src/main/asciidoc/configuration-guide.adoc

@@ -396,7 +396,7 @@ available versions.
 
 If you are behind a proxy, or need to customize the `RestTemplate` that is used behind the
 scenes, you can define a `RestTemplateCustomizer` bean in your configuration. For more
-details, {spring-boot-reference}/#boot-features-restclient-customization[check the
+details, {spring-boot-reference}/io/rest-client.html#io.rest-client.restclient.customization[check the
 documentation].
 
 NOTE: If you opt-in for `SpringIoInitializrMetadataUpdateStrategy`, you have to

initializr-docs/src/main/asciidoc/index.adoc

@@ -26,7 +26,7 @@ Stéphane Nicoll; Dave Syer; Madhura Bhave
 :spring-initializr-docs-version: current
 :spring-initializr-docs: https://docs.spring.io/initializr/docs/{spring-initializr-docs-version}/reference
 :spring-initializr-docs-current: https://docs.spring.io/initializr/docs/current/reference/html
-:spring-boot-reference: https://docs.spring.io/spring-boot/docs/{spring-boot-docs-version}/reference/htmlsingle
+:spring-boot-reference: https://docs.spring.io/spring-boot/reference
 
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