CELESTIA-APP v9.0.0-arabica — Arabica upgrade

Dear partners and node operators,
We are pleased to announce a new version of celestia-app today. Please upgrade as soon as possible to benefit from the latest features and fixes.


Celestia-app:
This release is intended for Arabica. If you are upgrading from v8, please read through the release notes carefully.

This is a major upgrade introducing reduction in block times to 3s.

Other highlights:

- Minimum glibc: 2.38. Ubuntu 22.04 and older are not supported for multiplexer builds and will fail to start with a glibc version mismatch error.
- The `celestia-appd update-config` command is deprecated. The config values it used to apply are now enforced by the binary at startup, so running it when initialising a new node is no longer necessary.
- The default value of `verify_data` in the `[blocksync]` section of `config.toml` is now false.

Release notes: https://github.com/celestiaorg/celestia-app/releases/tag/v9.0.0-arabica



Thank you,
Celestia Foundation