Merge branch 'cc7' into 'master'

Add CC7 banner and ELS7 update links

See merge request !143

docs/index.tpl

@@ -6,5 +6,7 @@
 * Check [Red Hat Enterprise Linux 8 latest updates](updates/rhel8/prod/latest_updates)
 * Check [CERN CentOS 7 latest updates](updates/cc7/prod/latest_updates)
 
+!!! danger "CC7 is due to be deprecated within the CERN environment on 30.06.2024, see [OTG0145248](https://cern.service-now.com/service-portal?id=outage&n=OTG0145248) for more details or refer to [Which distribution should I use](https://linux.web.cern.ch/which/)"
+
 <br/>
 # Latest news

docs/updates/cc7/els7/20240506.md

+## 2024-05-06
+
+ELS7 packages will not be available until a minimum of 01.07.2024. For more details about ELS at CERN, please refer to [Which distribution should I use : ATS/IT CC7 agreement](https://linux.web.cern.ch/which/#atsit-cc7-agreement)
+