Use UTF-8 for parsing /etc/os-release.

diff --git a/src/lib/util/kosrelease.cpp b/src/lib/util/kosrelease.cpp
index 0469aba..1d74f2a 100644
--- a/src/lib/util/kosrelease.cpp
+++ b/src/lib/util/kosrelease.cpp
@@ -134,9 +134,9 @@ public:
         QStringList parts;
         while (!file.atEnd()) {
             // Trimmed to handle indented comment lines properly
-            line = QString::fromLatin1(file.readLine()).trimmed();
+            line = QString::fromUtf8(file.readLine()).trimmed();
 
             if (line.startsWith(QLatin1Char('#'))) {
                 // Comment line
                 // Lines beginning with "#" shall be ignored as comments.
                 continue;