*/*: fix MissingRemoteId in metadata.xml

* Manually checked, I hope I caught most errors

Signed-off-by: Lucio Sauer <watermanpaint@posteo.net>

net-client/amfora/metadata.xml

@@ -5,4 +5,7 @@
         <email>svdm-gentoo@protonmail.com</email>
         <name>Simon van der Maas</name>
     </maintainer>
+    <upstream>
+        <remote-id type="github">makeworld-the-better-one/amfora</remote-id>
+    </upstream>
 </pkgmetadata>

net-client/kristall/metadata.xml

@@ -11,5 +11,6 @@
 	</longdescription>
 	<upstream>
 		<bugs-to>https://github.com/MasterQ32/kristall/issues</bugs-to>
+		<remote-id type="github">MasterQ32/kristall</remote-id>
 	</upstream>
 </pkgmetadata>