Enable version attribute substitution in Maven docs

Author: shai-almog

docs/developer-guide/Maven-Getting-Started.adoc

@@ -76,7 +76,7 @@ The https://shannah.github.io/cn1app-archetype-kotlin-template/getting-started.h
 
 Here is an example which generates a project based on the bare-bones kotlin template:
 
-[source,bash]
+[source,bash,subs="+attributes"]
 ----
 mvn com.codenameone:codenameone-maven-plugin:{cn1-plugin-release-version}:generate-app-project \
   -DarchetypeGroupId=$archetypeGroupId \
@@ -116,7 +116,7 @@ If you have an existing Codename One application project that uses the old Ant p
 
 A minimal invocation of this goal would look like:
 
-[source,bash]
+[source,bash,subs="+attributes"]
 ----
 # Specify your the version of the codenameone-maven-plugin.
 # Find the latest version at
@@ -137,7 +137,7 @@ After building the project, try running it to make sure that the migration worke
 
 ==== Command Line
 
-[source,bash]
+[source,bash,subs="+attributes"]
 ----
 cd myapp
 ./run.sh

docs/developer-guide/Maven-Updating-Codename-One.adoc

@@ -48,7 +48,7 @@ You can also update your Codename One dependencies manually by modifying the `cn
 
 E.g. Open the `pom.xml` file, and look for the following:
 
-[source,xml]
+[source,xml,subs="+attributes"]
 ----
 <cn1.plugin.version>{cn1-plugin-release-version}</cn1.plugin.version>
 <cn1.version>{cn1-release-version}</cn1.version>