Merge pull request hyperledger#2824 from anonyome/gm/user-agent-patch

patch for hyperledger#2781: User Agent header in doc loader

aries_cloudagent/vc/ld_proofs/document_downloader.py

@@ -9,6 +9,7 @@
 from typing import Dict, Optional
 import urllib.parse as urllib_parse
 from importlib import resources
+from ...version import __version__
 
 import requests
 from pyld import jsonld
@@ -122,6 +123,7 @@ def download(self, url: str, options: Optional[Dict], **kwargs):
             headers = options.get("headers")
             if headers is None:
                 headers = {"Accept": "application/ld+json, application/json"}
+            headers["User-Agent"] = f"AriesCloudAgent/{__version__}"
             response = requests.get(url, headers=headers, **kwargs)
 
             content_type = response.headers.get("content-type")