Feat: add button for remove header & footer in pipeline (#14486)

### What problem does this PR solve?

Feat: add button for remove header & footer in pipeline

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

deepdoc/parser/html_parser.py

@@ -52,7 +52,7 @@ class RAGFlowHtmlParser:
             raise TypeError("txt type should be string!")
 
         temp_sections = []
-        soup = BeautifulSoup(txt, "html5lib")
+        soup = BeautifulSoup(txt, "html.parser")
         # delete <style> tag
         for style_tag in soup.find_all(["style", "script"]):
             style_tag.decompose()
@@ -210,4 +210,3 @@ class RAGFlowHtmlParser:
             chunks.append(current_block)
 
         return chunks
-