loading evaluation metrics changed

[esti-tech]

notebooks/examples/summarization.ipynb

Line 216 in 06d842c

"metric = load(\"rouge\")"

use
rouge = evaluate.load('rouge')

instead

[sahitya-pavurala]

@esti-tech Hey, I just created a PR for this, please check

[pcuenca]

There is no need, in my opinion, to replace load with evaluate.load, because load is imported from evaluate in the same cell. Also, I would keep the variable name unchanged.