You need first to clone gns3-registry from https://github.com/GNS3/gns3-registry
Follow this steps:
1. ./utils/bump-gns3.py 25.08.0 ../../gns3/gns3-registry/appliances/infix.gns3a
2. TEST in gns3, just add the new version, start it.
3. run python3 check.py inside gns3-registry, verify infix is ok.
4. Create a pull request to gns3-registry
This fix#1107