Update GitLab to v17.8.1

[hugofnm]

Update GitLab to most recent release

Key improvements released in GitLab 17.8 :

• Enhance security with protected container repositories
• List the deployments related to a release
• Machine learning model experiments tracking in GA
• Track multiple to-do items in an issue or merge request
• Primary domain redirect for GitLab Pages
• Pipeline limits available in GitLab Community Edition
• Bug and security fixes, performance improvements, and UI improvements

Tested on RPi 5 8GB and working ✅

[github-actions]

🎉   Linting finished with no errors or warnings   🎉

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Linting Results

Severity	File	Description
ℹ️	gitlab/docker-compose.yml	External port mapping "2424:22": Port mappings may be unnecessary for the app to function correctly. Docker's internal DNS resolves container names to IP addresses within the same network. External access to the web interface is handled by the app_proxy container. Port mappings are only needed if external access is required to a port not proxied by the app_proxy, or if an app needs to expose multiple ports for its functionality (e.g., DHCP, DNS, P2P, etc.).

Legend

Symbol	Description
❌	Error: This must be resolved before this PR can be merged.
⚠️	Warning: This is highly encouraged to be resolved, but is not strictly mandatory.
ℹ️	Info: This is just for your information.

[nmfretz]

Great work @hugofnm! Thanks very much for updating the pre-start script to handle the proper upgrade path. I have reviewed and tested.