[/] Update SPDX identifiers.

Update CMakeLists.txt

CMakeLists.txt

@@ -13,7 +13,7 @@
 #   You should have received a copy of the GNU General Public License
 #   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
 #
-#   SPDX-License-Identifier: GPL-3.0+
+#   SPDX-License-Identifier: GPL-3.0-or-later
 #   License-Filename: LICENSE
 #
 ###

io.calamares.calamares.appdata.xml

@@ -2,7 +2,7 @@
 <component type="desktop">
   <id>io.calamares.calamares.desktop</id>
   <metadata_license>CC0-1.0</metadata_license>
-  <project_license>GPL-3.0+</project_license>
+  <project_license>GPL-3.0-or-later</project_license>
   <name>Calamares</name>
   <name xml:lang="da">Calamares</name>
   <name xml:lang="en-GB">Calamares</name>