Refine version properties for documentation build.

See spring-projects/spring-data-build#2638

Author: mp911de

src/main/antora/resources/antora-resources/antora.yml

@@ -5,16 +5,16 @@ asciidoc:
   attributes:
     attribute-missing: 'warn'
     chomp: 'all'
-    version: ${project.version}
-    copyright-year: ${current.year}
-    springversionshort: ${spring.short}
-    springversion: ${spring}
-    spring-data-commons-docs-url: https://docs.spring.io/spring-data/commons/reference/{version}
-    spring-data-commons-javadoc-base: https://docs.spring.io/spring-data/commons/reference/{version}/api/java
-    springdocsurl: https://docs.spring.io/spring-framework/reference/{springversionshort}
+    version: '${project.version}'
+    copyright-year: '${current.year}'
+    springversionshort: '${spring.short}'
+    springversion: '${spring}'
+    spring-data-commons-docs-url: '${documentation.baseurl}/spring-data/commons/reference/{version}'
+    spring-data-commons-javadoc-base: '{spring-data-commons-docs-url}/api/java'
+    springdocsurl: '${documentation.baseurl}/spring-framework/reference/{springversionshort}'
     spring-framework-docs: '{springdocsurl}'
-    springjavadocurl: https://docs.spring.io/spring-framework/docs/${spring}/javadoc-api
+    springjavadocurl: '${documentation.spring-javadoc-url}'
     spring-framework-javadoc: '{springjavadocurl}'
-    springhateoasversion: ${spring-hateoas}
-    releasetrainversion: ${releasetrain}
+    springhateoasversion: '${spring-hateoas}'
+    releasetrainversion: '${releasetrain}'
     store: Jpa