GIT_SILENT Update Appstream for new release

(cherry picked from commit ed3c8ae7)

.clang-format

@@ -79,7 +79,7 @@ SpaceAfterTemplateKeyword: false
 AlwaysBreakTemplateDeclarations: true
 
 # macros for which the opening brace stays attached.
-ForEachMacros: [ foreach, Q_FOREACH, BOOST_FOREACH, forever, Q_FOREVER, QBENCHMARK, QBENCHMARK_ONCE ]
+ForEachMacros: [ foreach, Q_FOREACH, BOOST_FOREACH, forever, Q_FOREVER, QBENCHMARK, QBENCHMARK_ONCE , wl_resource_for_each, wl_resource_for_each_safe ]
 
 # keep lambda formatting multi-line if not empty
 AllowShortLambdasOnASingleLine: Empty

org.kde.kontrast.appdata.xml

@@ -100,10 +100,10 @@ SPDX-LicenseRef: CC0-1.0
   <url type="bugtracker">https://invent.kde.org/accessibility/kontrast/-/issues</url>
   <url type="donation">https://liberapay.com/Carl/</url>
   <releases>
+    <release version="21.08.2" date="2021-10-07"/>
     <release version="21.08.1" date="2021-09-02"/>
     <release version="21.08.0" date="2021-08-12"/>
     <release version="21.04.3" date="2021-07-08"/>
-    <release version="21.04.2" date="2021-06-10"/>
   </releases>
   <developer_name>Carl Schwan</developer_name>
   <developer_name xml:lang="ca">Carl Schwan</developer_name>