fix duckduckgosearch.py bug (#1410)

### What problem does this PR solve?

fix duckduckgosearch.py bug

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

graph/component/duckduckgosearch.py

@@ -16,7 +16,7 @@
 import random
 from abc import ABC
 from functools import partial
-from duckduckgosearch import DDGS
+from duckduckgo_search import DDGS
 import pandas as pd
 
 from graph.component.base import ComponentBase, ComponentParamBase