Review and fixes for compatibility-matrix.adoc (#785)

docs/modules/plugin/pages/compatibility-matrix.adoc

@@ -14,23 +14,17 @@ That is:
 
 == AsciidoctorJ compatible versions
 
+Versions not listed below are not supported, please consider upgrading.
+
 |===
 |Asciidoctor Maven Plugin | AsciidoctorJ | Supported
 
 |v3.x.x
 |v2.x.x
 |Yes
 
-|v2.x.x
+|v2.2.x
 |v2.x.x
 |Yes
 
-|v1.6.0
-|v1.5.x, v1.6.x
-|No
-
-|v1.5.x
-|v1.5.x
-|No
-
 |===

docs/modules/site-integration/pages/compatibility-matrix.adoc

@@ -5,7 +5,7 @@ Release candidate releases are not accounted.
 
 == Versions
 
-Since v3.x.x the Asciidoctor Maven Plugin has been split into independent components for the Maven Mojo and Maven Site modules.
+Versions not listed below are not supported, please consider upgrading.
 
 |===
 |Asciidoctor Doxia Module | Maven Site Plugin | Supported
@@ -15,20 +15,3 @@ Since v3.x.x the Asciidoctor Maven Plugin has been split into independent compon
 |Yes
 
 |===
-
-|===
-|Asciidoctor Maven Plugin | Maven Site Plugin | Supported
-
-|v2.2.2
-|v3.1x.x
-|Yes
-
-|v2.0.x ~ v2.2.1
-|v3.4 ~ v3.9.1
-|Yes
-
-|v1.5.6 ~ v1.6.0
-|v3.4 ~ v3.9.1
-|No
-
-|===

docs/modules/site-integration/pages/exposed-metadata.adoc

@@ -1,10 +1,10 @@
-= Exposed metadata
+= Exposed Metadata
 :asciidoctor-docs-url: https://docs.asciidoctor.org/asciidoc/latest
 :maven-site-plugin-docs-url: https://maven.apache.org/plugins/maven-site-plugin
 
 The Asciidoctor Maven Site integration collaborates with Doxia to expose some of its information.
 
-== Document Header metadata
+== Document Header Metadata
 
 The following elements from the {asciidoctor-docs-url}/document/header/[header] are integrated: