metainfo: Fix missing screenshot

Author: ryonakano

data/com.github.alecaddd.sequeler.appdata.xml.in.in

@@ -501,13 +501,13 @@
 	</releases>
 	<screenshots>
 		<screenshot type="default">
-			<image>https://raw.githubusercontent.com/Alecaddd/sequeler/master/data/assets/screenshots/sequeler-screenshot.png</image>
+			<image>https://raw.githubusercontent.com/Alecaddd/sequeler/v0.8.x/data/assets/screenshots/sequeler-screenshot.png</image>
 		</screenshot>
 		<screenshot>
-			<image>https://raw.githubusercontent.com/Alecaddd/sequeler/master/data/assets/screenshots/sequeler-screenshot1.png</image>
+			<image>https://raw.githubusercontent.com/Alecaddd/sequeler/v0.8.x/data/assets/screenshots/sequeler-screenshot1.png</image>
 		</screenshot>
 		<screenshot>
-			<image>https://raw.githubusercontent.com/Alecaddd/sequeler/master/data/assets/screenshots/sequeler-screenshot2.png</image>
+			<image>https://raw.githubusercontent.com/Alecaddd/sequeler/v0.8.x/data/assets/screenshots/sequeler-screenshot2.png</image>
 		</screenshot>
 	</screenshots>
 	<developer_name>Alessandro Castellani</developer_name>