Add new model revision of Querit/Querit-4B to match the results of new results on leaderboard

• I have filled out the ModelMeta object to the extent possible
• I have ensured that my model can be loaded using
  • mteb.get_model(model_name, revision) and
  • mteb.get_model_meta(model_name, revision)
• I have tested the implementation works on a representative set of tasks.
• The model is public, i.e., is available either as an API or the weights are publicly available to download