fix(enterprise):fix previous download link

fix download link for standalone webapp download version 7.1.0-Final
chore(how-to):update cockpit plugin mvn dependency

refer to #CAM-2164
chore(how-to): extend hint for tomcat cockpit plugin deployment

related to #CAM-2145

Conflicts:
	site/src/documents/real-life/how-to/chapters/080-cockpit/develop-cockpit-plugin.html.md