docs: minor fix in fj-mod-openpdf-ext documentation

Java compatibility matrix heading had a wrong label
Starting version for OpenPDF needing java 21 is 2.2

Author: fugerit79

fj-doc-guide/src/main/docs/asciidoc/chapters/06_5_mod-openpdf-ext.adoc

@@ -93,14 +93,14 @@ For a demo of this doc handler usage you can refer to the link:https://github.co
 [#doc-handler-mod-openrpdf-ext-java-version]
 ==== Java version compatibility
 
-NOTE: OpenPDF used to be compatible with java 8+, but starting with version 2.4.0 they moved to java 21+.
+NOTE: OpenPDF used to be compatible with java 8+, but starting with version 2.2 they moved to java 21+.
 
 Starting with Fugerit Venus Doc version 8.16.0 the xref:#doc-maven-dependency-handling-java-version[Dependencies handling is based on java runtime version], here is the compatibility matrix :
 
 [cols="2*", options="header"]
 |====================================================================================================================================================================================
 
-| java version | OpenRTF version
+| java version | OpenPDF version
 
 | 21+
 | 2.4.0+