This release changes the way that the og:image fully-qualified URLs are generated.
Previously it would use the host header, which you could override from your reverse proxy if you wanted to customise it.
Now by default the public base URL is set in your docker-compose.yml file (see example here).
If you want to override this dynamically (for example if you're serving the same IPP instance on multiple domains), you can remove this env variable, and instead set it as a publicBaseUrl header on the request from your reverse proxy to IPP. Make sure to remove the env variable as it takes precedence.
https://github.com/alangrainger/immich-public-proxy?tab=readme-ov-file#serving-from-multiple-domains