Found broken `/self-hosting/charts/langfuse/README` link. Please fix!

[danim55]

[dosubot]

I found 2 similar issues that might be helpful:

• Found broken /docs/self-hosting link. Please fix! - This issue was resolved by adding a redirect for the self-hosting link.

• Broken link to upgrade guides. - This issue was resolved by updating the link to the v3 upgrade guide on the self-hosting v2 page.

[marcklingen]

done