Instant pot chicken noodle soup

INGREDIENTS

1 3/4 lb

boneless skinless chicken breasts (about 3, chopped into 1-inch pieces)

1 1/2 cups

diced onions (about half an onion)

1 cup

diced celery (about 3 stalks)

1 cup

diced carrots (about 3 carrots)

15 oz

can corn (drained (about 1 cup))

6 cups

low-sodium chicken broth

8 oz

rotini pasta

3 tbsp

fresh dill

1 tbsp

butter

1/4 tsp

freshly ground black pepper