Fix oidc profile avatar route

src/oidcserver.js

@@ -506,7 +506,7 @@ async function getClaims(username/*, use, scope*/) {
         given_name: firstName,
         locale: 'en-US',
         name: user.displayName,
-        picture: `https://${dashboardFqdn}/api/v1/profile/avatar/${user.id}.png`, // some apps get surprised if we respond with a svg
+        picture: `https://${dashboardFqdn}/api/v1/profile/avatar/${user.id}`, // we always store as png
         preferred_username: user.username,
         groups: allGroups.filter(function (g) { return g.userIds.indexOf(user.id) !== -1; }).map(function (g) { return `${g.name}`; })
     };