Typo.

fattura_elettronica_reader/api.py

@@ -800,7 +800,7 @@ def pipeline(source: str, file_type: str, data: dict):
 
             if not data['ignore_assets_checksum']:
                 if not asset_checksum_matches(trusted_list_file):
-                    raise AssetsChecksumDoesNotMatch("Run the program with the '--ignore-assets-checksum' option, contact the developer or open a pull request. Have a look at " + const.docs['assets url'])
+                    raise AssetsChecksumDoesNotMatch("Run the program with the '--ignore-assets-checksum' option, contact the developer or open a pull request. Have a look at " + const.docs['assets_url'])
 
             trusted_list_xml_root = parse_xml_file(trusted_list_file)