Update antora-extensions to v1.8.2

Issue #4534

Author: fmbenhassine

spring-batch-docs/pom.xml

@@ -26,7 +26,7 @@
                         <package>@antora/atlas-extension@1.0.0-alpha.1</package>
                         <package>@antora/collector-extension@1.0.0-alpha.3</package>
                         <package>@asciidoctor/tabs@1.0.0-beta.3</package>
-                        <package>@springio/antora-extensions@1.7.0</package>
+                        <package>@springio/antora-extensions@1.8.2</package>
                         <package>@springio/asciidoctor-extensions@1.0.0-alpha.9</package>
                     </packages>
                 </configuration>