docs: fix broken Appearance of langchain_community/document_loaders/recursive_url_loader API Reference (#29305)

# PR mesesage
## Description
Fixed a broken Appearance of RecurisveUrlLoader API Reference.

### Before
<p align="center">
<img width="750" alt="image"
src="https://github.com/user-attachments/assets/f39df65d-b788-411d-88af-8bfa2607c00b"
/>
<img width="750" alt="image"
src="https://github.com/user-attachments/assets/b8a92b70-4548-4b4a-965f-026faeebd0ec"
/>
</p>

### After
<p align="center">
<img width="750" alt="image"
src="https://github.com/user-attachments/assets/8ea28146-de45-42e2-b346-3004ec4dfc55"
/>
<img width="750" alt="image"
src="https://github.com/user-attachments/assets/914c6966-4055-45d3-baeb-2d97eab06fe7"
/>
</p>

## Issue:
N/A
## Dependencies
None
## Twitter handle
N/A

# Add tests and docs
Not applicable; this change only affects documentation.

# Lint and test
Ran make format, make lint, and make test to ensure no issues.

libs/community/langchain_community/document_loaders/recursive_url_loader.py

@@ -53,7 +53,8 @@ def _metadata_extractor(
 class RecursiveUrlLoader(BaseLoader):
     """Recursively load all child links from a root URL.
 
-    **Security Note**: This loader is a crawler that will start crawling
+    **Security Note**:
+        This loader is a crawler that will start crawling
         at a given URL and then expand to crawl child links recursively.
 
         Web crawlers should generally NOT be deployed with network access
@@ -162,7 +163,7 @@ class RecursiveUrlLoader(BaseLoader):
 
             def bs4_extractor(html: str) -> str:
                 soup = BeautifulSoup(html, "lxml")
-                    return re.sub(r"\n\n+", "\n\n", soup.text).strip()
+                return re.sub(r"\\n\\n+", "\\n\\n", soup.text).strip()
 
             loader = RecursiveUrlLoader(
                 "https://docs.python.org/3.9/",