update metainfo.xml

dist/linux/common/org.cryptomator.Cryptomator.metainfo.xml

@@ -66,6 +66,7 @@
 	</content_rating>
 
 	<releases>
+		<release date="2023-03-01" version="1.7.0"/>
 		<release date="2022-12-14" version="1.6.17"/>
 		<release date="2022-12-06" version="1.6.16"/>
 		<release date="2022-10-06" version="1.6.15"/>