Use a valid SPDX license ID.

Author: postmodern

gemspec.yml

@@ -6,7 +6,7 @@ description:
   Ronin Database. Provides database models storing and querying network data,
   advisory data, credentials, and OSINT data.
 
-license: LGPL-3.0
+license: LGPL-3.0-or-later
 authors: Postmodern
 email: postmodern.mod3@gmail.com
 homepage: https://ronin-rb.dev/