Update metainfo for 0.13.1

data/org.postmarketos.Megapixels.metainfo.xml

@@ -26,6 +26,13 @@
 	<url type="homepage">https://sr.ht/~martijnbraam/megapixels</url>
 	<content_rating type="oars-1.1" />
 	<releases>
+		<release version="0.13.1" date="2020-12-06">
+			<description>
+				<p>
+					Small update to reduce preview latency
+				</p>
+			</description>
+		</release>
 		<release version="0.13.0" date="2020-12-06">
 			<description>
 				<p>