Update install script for flatpak support

ru.linux_gaming.PortProton.metainfo.xml

@@ -10,11 +10,14 @@
 		<name>Mikhail Tergoev</name>
 	</developer>
 
+	<developer_name>Mikhail Tergoev</developer_name>
+
 	<url type="homepage">https://linux-gaming.ru</url>
 	<url type="bugtracker">https://github.com/Castro-Fidel/PortWINE/issues</url>
 	<url type="donation">https://linux-gaming.ru/t/podderzhat-proekt/123/</url>
 	<url type="vcs-browser">https://github.com/Castro-Fidel/PortWINE</url>
-	<url type="help">https://linux-gaming.ru/c/portproton/4</url>
+	<url type="help">https://discord.gg/FTaheP99wE</url>
+	<url type="faq">https://linux-gaming.ru/c/portproton/4</url>
 
 	<metadata_license>CC0-1.0</metadata_license>
 	<project_license>MIT</project_license>
@@ -69,6 +72,11 @@
 		</screenshot>
 	</screenshots>
 
+	<branding>
+		<color type="primary" scheme_preference="light">#8e7dbb</color>
+		<color type="primary" scheme_preference="dark">#352d48</color>
+	</branding>
+
   <categories>
     <category>Game</category>
   </categories>
@@ -100,6 +108,15 @@
 	<content_rating type="oars-1.1"/>
 
 	<releases>
+		<release version="1.6" date="2024-04-01">
+			<description>
+				<ul>
+					<li>added flatpak support to install script</li>
+					<li>added branding to metainfo</li>
+					<li>added Spanish translation to installer</li>
+				</ul>
+			</description>
+		</release>
 		<release version="1.5.2" date="2024-03-31">
 			<description>
 				<ul>