Fix the router-link name for ProjectLink component

[joepavitt]

Description

https://d.pr/v/u7qcC7 flagged that when devices are attached to a project, the project name is not showing. Upon investigation, this was introduced in #1711 where we renamed the view "ProjectDeployments" to "ProjectInstances" and so when rendering the ProjectLink component, it was failing to render because it couldn't find the destination page (still pointing to ProjectDeployments).

Checklist

• I have read the contribution guidelines
• [-] Suitable unit/system level tests have been added and they pass
• [-] Documentation has been updated
  • [-] Upgrade instructions
  • [-] Configuration details
  • [-] Concepts
• [-] Changes flowforge.yml?
  • [-] Issue/PR raised on flowforge/helm to update ConfigMap Template
  • [-] Issue/PR raised on flowforge/CloudProject to update values for Staging/Production

Labels

• [-] Backport needed? -> add the backport label
• [-] Includes a DB migration? -> add the area:migration label