Fix wrong code location of llama-index-tools-duckduckgo (#11465)

...ntegrations/tools/llama-index-tools-duckduckgo/.gitignore

...dex-integrations/tools/llama-index-tools-duckduckgo/BUILD

...egrations/tools/llama-index-tools-duckduckgo/CHANGELOG.md

...-integrations/tools/llama-index-tools-duckduckgo/Makefile

...integrations/tools/llama-index-tools-duckduckgo/README.md

...a-index-tools-duckduckgo/examples/duckduckgo_search.ipynb

...index-tools-duckduckgo/llama_index/tools/duckduckgo/BUILD

...tools-duckduckgo/llama_index/tools/duckduckgo/__init__.py

...dex-tools-duckduckgo/llama_index/tools/duckduckgo/base.py

...rations/tools/llama-index-tools-duckduckgo/pyproject.toml

...tions/tools/llama-index-tools-duckduckgo/requirements.txt

...tegrations/tools/llama-index-tools-duckduckgo/tests/BUILD

...ions/tools/llama-index-tools-duckduckgo/tests/__init__.py

...ama-index-tools-duckduckgo/tests/test_tools_duckduckgo.py