[simple-scan] clarify project licence in appdata

[Bartosz <bkosiorek src gnome org>]

commit 68d160fd6613186e05c5a0fffb914e03caa1a310
Author: Nick Richards <nick nedrichards com>
Date:   Fri Apr 8 10:51:03 2022 +0100

    clarify project licence in appdata

 data/simple-scan.appdata.xml.in | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/data/simple-scan.appdata.xml.in b/data/simple-scan.appdata.xml.in
index f72fb34c..97884cf7 100644
--- a/data/simple-scan.appdata.xml.in
+++ b/data/simple-scan.appdata.xml.in
@@ -2,14 +2,14 @@
 <component type="desktop">
   <id>simple-scan.desktop</id>
   <metadata_license>CC0-1.0</metadata_license>
-  <project_license>GPL-3.0+ and CC-BY-SA-3.0</project_license>
+  <project_license>GPL-3.0+</project_license>
   <name>Document Scanner</name>
   <summary>Make a digital copy of your photos and documents</summary>
   <description>
     <p>
       A really easy way to scan both text and images.
-      You can crop out the bad parts of an image and rotate it if it is the wrong way round.
-      You can print your scans, export them to pdf, or save them in a range of image formats.
+      You can crop out the bad parts of an image and rotate if it's the wrong way round.
+      You can print your scans, export them to PDF, or save them in a range of image formats.
     </p>
     <p>
       This app uses the SANE framework to support most existing scanners.