Fill in 4.2.x releases for maintenance page (geonetwork#7879)

docs/manual/docs/overview/change-log/maintenance/index.md

@@ -1,8 +1,21 @@
 # Maintenance
 
-The GeoNetwork 4.2.x series is stable and recommended for production use and new installations of GeoNetwork. 
+The GeoNetwork 4.2.x series has entered maintenance for continued support production systems.
+
 This series is under active use by our community, with regular improvements, documentation updates, bug reports, fixes, and releases.
 
 ## Latest
 
+- [Version 4.2.9](../version-4.2.9.md)
+
 ## History
+
+- [Version 4.2.8](../version-4.2.8.md)
+- [Version 4.2.7](../version-4.2.7.md)
+- [Version 4.2.6](../version-4.2.6.md)
+- [Version 4.2.5](../version-4.2.5.md)
+- [Version 4.2.4](../version-4.2.4.md)
+- [Version 4.2.3](../version-4.2.3.md)
+- [Version 4.2.2](../version-4.2.2.md)
+- [Version 4.2.1](../version-4.2.1.md)
+- [Version 4.2.0](../version-4.2.0.md)