Fixing download file names with GitHub

open62541.spec

@@ -4,7 +4,7 @@ Release:  1%{?dist}
 Summary:  OPC UA implementation
 License:  MPLv2.0
 URL:      http://open62541.org
-Source0:  https://github.com/ctron/open62541/archive/%{name}-%{version}.tar.gz
+Source0:  https://github.com/ctron/open62541/archive/v%{version}.tar.gz
 
 BuildRequires: cmake, python