Update default GLM version in model picker to GLM 5

**Author:** cerq
**Channel:** #shelley
**Link:** https://discord.com/channels/1405685085923049482/1450334528210993295/1480411750879854705

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## Request

Update the default GLM version in the model picker to GLM 5.

## Context

This request was made in the context of discussions about model selection and configuration options in Shelley.
