Update ABOUT file

Signed-off-by: Chin Yeung Li <[email protected]>

Author: chinyeungli

about.ABOUT

@@ -2,7 +2,7 @@ about_resource: .
 name: AboutCode-toolkit
 version: 7.0.0
 author: Jillian Daguil, Chin Yeung Li, Philippe Ombredanne, Thomas Druez
-copyright: Copyright (c) 2013-2020 nexB Inc.
+copyright: Copyright (c) nexB Inc.
 description: |
     AboutCode Toolkit is a tool to process ABOUT files. An ABOUT file
     provides a simple way to document the provenance (origin and license)
@@ -15,6 +15,7 @@ licenses:
         key: apache-2.0
         name: Apache License 2.0
         url: https://enterprise.dejacode.com/urn/?urn=urn:dje:license:apache-2.0
+		spdx_license_key: Apache-2.0
 notice_file: NOTICE
 owner: nexB Inc.
 vcs_repository: https://github.com/nexB/aboutcode-toolkit.git