[Improvement] add default user-agent header in webpage loader (#1219)

embedchain/loaders/web_page.py

@@ -22,7 +22,10 @@ class WebPageLoader(BaseLoader):
 
     def load_data(self, url):
         """Load data from a web page using a shared requests' session."""
-        response = self._session.get(url, timeout=30)
+        headers = {
+            "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36",  # noqa:E501
+        }
+        response = self._session.get(url, headers=headers, timeout=30)
         response.raise_for_status()
         data = response.content
         content = self._get_clean_content(data, url)