Update dependencies for fast installation (#811)

embedchain/loaders/docs_site_loader.py

@@ -3,7 +3,14 @@ import logging
 from urllib.parse import urljoin, urlparse
 
 import requests
-from bs4 import BeautifulSoup
+
+try:
+    from bs4 import BeautifulSoup
+except ImportError:
+    raise ImportError(
+        'DocsSite requires extra dependencies. Install with `pip install --upgrade "embedchain[dataloaders]"`'
+    ) from None
+
 
 from embedchain.helper.json_serializable import register_deserializable
 from embedchain.loaders.base_loader import BaseLoader