Update contact procedure for TRE- formatting

docs/safe-haven-services/tre-container-user-guide/container-examples.md

@@ -2,7 +2,7 @@
 
 To help with writing your own Dockerfiles to run within a Trusted Research Environment via the Container Execution Service, we have provided a set of example Dockerfiles for commonly used software stacks. These show examples of how to set up containers with non-root user access, as well as other best practices for developing secure containers.
 
-To request access to these container examples please contact the EIDF helpdesk ([email protected]) with the subject line "TRE Container Support".
+To request access to these container examples please contact the [EIDF Helpdesk](https://portal.eidf.ac.uk/queries/submit) referencing this page, otherwise send your query by email to [[email protected]](mailto:[email protected]) with the subject line "TRE Container Support". 
 
 ## Example Containers