fix duckduckgo search subsection error (#4430)

### What problem does this PR solve?

duckduckgo search 6.3.0 still has error sometimes, need to update to
7.2.0, after updated, it works ok.
this PR is going to fix this issue
https://github.com/infiniflow/ragflow/issues/4396

### Type of change

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

---------

Co-authored-by: xiaohzho <xiaohzho@cisco.com>

poetry.lock

 
 [[package]]
 name = "duckduckgo-search"
-version = "6.3.7"
+version = "7.2.1"
 description = "Search for words, documents, images, news, maps and text translation using the DuckDuckGo.com search engine."
 optional = false
 python-versions = ">=3.8"
 files = [
-    {file = "duckduckgo_search-6.3.7-py3-none-any.whl", hash = "sha256:6a831a27977751e8928222f04c99a5d069ff80e2a7c78b699c9b9ac6cb48c41b"},
-    {file = "duckduckgo_search-6.3.7.tar.gz", hash = "sha256:53d84966429a6377647e2a1ea7224b657575c7a4d506729bdb837e4ee12915ed"},
+    {file = "duckduckgo_search-7.2.1-py3-none-any.whl", hash = "sha256:72ebbf6ad8759e3c3c79521cd66256e7a4ac741c522fd9342db94de91745ef87"},
+    {file = "duckduckgo_search-7.2.1.tar.gz", hash = "sha256:cb214b6cd9505a41c228445a9c254620b93519c59292662d62ef19d0220618a0"},
 ]
 
 [package.dependencies]
 click = ">=8.1.7"
-primp = ">=0.8.1"
+lxml = ">=5.3.0"
+primp = ">=0.10.0"
 
 [package.extras]
-dev = ["mypy (>=1.11.1)", "pytest (>=8.3.1)", "pytest-asyncio (>=0.23.8)", "ruff (>=0.6.1)"]
-lxml = ["lxml (>=5.2.2)"]
+dev = ["mypy (>=1.13.0)", "pytest (>=8.3.4)", "pytest-dependency (>=0.6.0)", "ruff (>=0.8.3)"]
 
 [[package]]
 name = "editdistance"
 
 [[package]]
 name = "primp"
-version = "0.9.3"
+version = "0.10.0"
 description = "HTTP client that can impersonate web browsers, mimicking their headers and `TLS/JA3/JA4/HTTP2` fingerprints"
 optional = false
 python-versions = ">=3.8"
 files = [
-    {file = "primp-0.9.3-cp38-abi3-macosx_10_12_x86_64.whl", hash = "sha256:30d5c4f03abeab8fd307ddf4c615d8d093367f3be1a5299078f811982db7cb6f"},
-    {file = "primp-0.9.3-cp38-abi3-macosx_11_0_arm64.whl", hash = "sha256:3e3bff0bcffdf746b68486db24ac6dc6db2f202f048f82e0303385ef76dc5c1e"},
-    {file = "primp-0.9.3-cp38-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:15325ec0b916e48a65929f647d7dd12fb1400e76a6aeba72f7e205c94c4aaa82"},
-    {file = "primp-0.9.3-cp38-abi3-manylinux_2_34_aarch64.whl", hash = "sha256:de97cc10130a68edcd4e173cf01c628a10b9b6a6e19393200b12f1a1ddcb863d"},
-    {file = "primp-0.9.3-cp38-abi3-manylinux_2_34_armv7l.whl", hash = "sha256:cba94e48c9b245a9daac96807aa020525c1a66c1141d4c2b11db4e2ccb69da33"},
-    {file = "primp-0.9.3-cp38-abi3-musllinux_1_2_aarch64.whl", hash = "sha256:1d1df5a9808b82b960df1f72ff53a9ab9c77dce61fcbe5776a11cf5f59dd7f28"},
-    {file = "primp-0.9.3-cp38-abi3-musllinux_1_2_x86_64.whl", hash = "sha256:484fc69dbed5ca14561d54aecd17f011c8ffa495023134bb9a94edb808ae3e1b"},
-    {file = "primp-0.9.3-cp38-abi3-win_amd64.whl", hash = "sha256:824a5606ad67cb842ccc5158f19f9ccd1387e25e1374edd69f87cd7616cf3ea9"},
-    {file = "primp-0.9.3.tar.gz", hash = "sha256:bc6490c659c741c6586bd160ed51b2e04f9dbc3b61bc1dd1af1ce66eefea663e"},
+    {file = "primp-0.10.0-cp38-abi3-macosx_10_12_x86_64.whl", hash = "sha256:7a91a089bf2962b5b56c8d83d09535eb81cf55b53c09d83208b9e5a715cf2c17"},
+    {file = "primp-0.10.0-cp38-abi3-macosx_11_0_arm64.whl", hash = "sha256:0128453cce81552f7aa6ac2bf9b8741b7816cdb2d10536e62c77daaf6483b9af"},
+    {file = "primp-0.10.0-cp38-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:a959e9a83cff0ae7a85a02cc183e4db636f69ff41dddb7c4e32f997924923417"},
+    {file = "primp-0.10.0-cp38-abi3-manylinux_2_34_aarch64.whl", hash = "sha256:8e711cfa019fa9bdc0cba4d5d596f319c884a4329e505bd73e92eee0b024061a"},
+    {file = "primp-0.10.0-cp38-abi3-manylinux_2_34_armv7l.whl", hash = "sha256:b859336d9a35669b68a29c5d8f050e0dca380452dabf6c9667bb8599f010d164"},
+    {file = "primp-0.10.0-cp38-abi3-musllinux_1_2_aarch64.whl", hash = "sha256:dc875cc9a733fe3e6344a37f2b5888e0a9605bb37807fc3009f3b03786408f34"},
+    {file = "primp-0.10.0-cp38-abi3-musllinux_1_2_x86_64.whl", hash = "sha256:a27c5d997c37bf8237963c11e376eaa66e7eccee39164e3e259a1c3767c304d6"},
+    {file = "primp-0.10.0-cp38-abi3-win_amd64.whl", hash = "sha256:7fe94c3164c2efffff08f7f54c018ac445112961b3ce4f4f499315ba0a9d1ef3"},
+    {file = "primp-0.10.0.tar.gz", hash = "sha256:93142590a5a1958240ee5b74faaf2f55185ed499ccaabc622d71cb0cc8a47a0b"},
 ]
 
 [package.extras]
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.10,<3.13"
-content-hash = "49c7bd779f6a071151ad981c3c67b2d8045c91860ba604d29136a2240fc54c64"
+content-hash = "a04bec1c78e27365d884248e7759dd85231605c2780a951d73fe8b4d5018c87b"

pyproject.toml

 deepl = "1.18.0"
 demjson3 = "3.0.6"
 discord-py = "2.3.2"
-duckduckgo-search = "~6.3.0"
+duckduckgo-search = "~7.2.0"
 editdistance = "0.8.1"
 elastic-transport = "8.12.0"
 elasticsearch = "8.12.1"