502 Error for Bitcoin Core 29

Looks like updating to Bitcoin Core 29.0 breaks the connection for Jam.

**Expected behavior**
Connect to backend

A clear and concise description of what you expected to happen.
Connect to backend node

**Actual behavior**
502 error

A clear and concise description of what the bug is and what actually happens.

**Steps to reproduce the problem**
1. Update Bitcoin Core to 29.0
2. Try to run Jam

**Specifications**
- Version: latest
- Platform: umbrel

**Additional context**

No Connection
No connection to backend: The server reported a problem: 502 Bad Gateway
Please confirm that the backend is running and [see the docs for more information](https://jamdocs.org/FAQ/#how-to-resolve-no-connection-to-gateway).

502 Bad Gateway http://umbrel.local:5002/api/v1/session
[v0.3.0](https://github.com/joinmarket-webui/jam/tags)
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