Prepare release org.glassfish.expressly:expressly:6.0.0

Author: eclipse-expressly-bot

pom.xml

@@ -30,7 +30,7 @@
 
     <groupId>org.glassfish.expressly</groupId>
     <artifactId>expressly</artifactId>
-    <version>6.0.0-SNAPSHOT</version>
+    <version>6.0.0</version>
 
     <name>Eclipse Expressly</name>
     <description>Jakarta Expression Language Implementation</description>