Update VideoPrism function call name in model-libraries-snippets.ts (#1643)

We updated the some functions in VideoPrism to make the model loading
work with model.id from the huggingface repo; this is a small update to
videoprism inside model-libraries-snippets.ts so the code still runs

Author: jenjsun

packages/tasks/src/model-libraries-snippets.ts

@@ -1644,10 +1644,9 @@ image = sana(
 export const videoprism = (model: ModelData): string[] => [
 	`# Install from https://github.com/google-deepmind/videoprism
 import jax
-import jax.numpy as jnp
 from videoprism import models as vp
 
-flax_model = vp.MODELS["${model.id}"]()
+flax_model = vp.get_model("${model.id}")
 loaded_state = vp.load_pretrained_weights("${model.id}")
 
 @jax.jit