Fix for Flathub.

matrique.appdata.xml

@@ -15,23 +15,23 @@
   </description>
   <launchable type="desktop-id">org.eu.encom.matrique</launchable>
   <screenshots>
-​    <screenshot type="default">
-​      <caption>Overview</caption>
-​      <image>https://raw.githubusercontent.com/encombhat/flathub/org.eu.encom.matrique/screenshots/1.png</image>
-​    </screenshot>
-​    <screenshot>
-​      <caption>Room Config</caption>
-​      <image>https://raw.githubusercontent.com/encombhat/flathub/org.eu.encom.matrique/screenshots/2.png</image>
-​    </screenshot>
-​    <screenshot>
-​      <caption>Create Room</caption>
-​      <image>https://raw.githubusercontent.com/encombhat/flathub/org.eu.encom.matrique/screenshots/3.png</image>
-​    </screenshot>
-​    <screenshot>
-​      <caption>Settings Panel</caption>
-​      <image>https://raw.githubusercontent.com/encombhat/flathub/org.eu.encom.matrique/screenshots/4.png</image>
-​    </screenshot>
-​  </screenshots>
+    <screenshot type="default">
+      <caption>Overview</caption>
+      <image>https://raw.githubusercontent.com/encombhat/flathub/org.eu.encom.matrique/screenshots/1.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Room Config</caption>
+      <image>https://raw.githubusercontent.com/encombhat/flathub/org.eu.encom.matrique/screenshots/2.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Create Room</caption>
+      <image>https://raw.githubusercontent.com/encombhat/flathub/org.eu.encom.matrique/screenshots/3.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Settings Panel</caption>
+      <image>https://raw.githubusercontent.com/encombhat/flathub/org.eu.encom.matrique/screenshots/4.png</image>
+    </screenshot>
+  </screenshots>
   <url type="homepage">https://gitlab.com/b0/matrique</url>
   <content_rating type="oars-1.0">
     <content_attribute id="social-chat">intense</content_attribute>