[gnome-characters] Use proper SPDX license identifiers

[Christopher Davis <christopherdavis src gnome org>]

commit f1cfcb96e59f1054b6aeb59e5bc813d504019697
Author: Maximiliano Sandoval R <msandova gnome org>
Date:   Fri Feb 18 15:31:48 2022 +0100

    Use proper SPDX license identifiers
    
    See https://spdx.org/licenses/.

 data/org.gnome.Characters.appdata.xml.in | 2 +-
 meson.build                              | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/data/org.gnome.Characters.appdata.xml.in b/data/org.gnome.Characters.appdata.xml.in
index 7d47627..2a7a69f 100644
--- a/data/org.gnome.Characters.appdata.xml.in
+++ b/data/org.gnome.Characters.appdata.xml.in
@@ -4,7 +4,7 @@
   <name>Characters</name>
   <summary>Character map application</summary>
   <metadata_license>CC0-1.0</metadata_license>
-  <project_license>BSD-3-Clause AND GPL-2.0+</project_license>
+  <project_license>BSD-3-Clause AND GPL-2.0-or-later</project_license>
   <description>
     <p>
       Characters is a simple utility application to find and insert unusual characters.  It allows you to 
quickly find the character you are looking for by searching for keywords.
diff --git a/meson.build b/meson.build
index d381296..d9f24f6 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project(
   'gnome-characters', 'c',
   version: '42.0',
-  license: ['BSD3', 'GPL2+'],
+  license: ['BSD-3-Clause', 'GPL-2.0-or-later'],
   default_options: 'buildtype=debugoptimized',
   meson_version: '>= 0.46.0'
 )