Change seed.radicle.garden -> iris.radicle.xyz

We were using a deprecated seed dns name.

src/components/IdentityButton.svelte

@@ -64,7 +64,7 @@
         target="_blank">
         <DropdownListItem styleGap="0.5rem" styleWidth="100%" selected={false}>
           <Icon name="seed" />
-          view on seed.radicle.garden
+          view on iris.radicle.xyz
           <span style:margin-left="auto"><Icon name="open-external" /></span>
         </DropdownListItem>
       </a>

src/lib/utils.ts

@@ -250,7 +250,7 @@ export function verdictIcon(verdict: Review["verdict"]) {
 
 export function explorerUrl(
   path: string,
-  seed = "seed.radicle.garden",
+  seed = "iris.radicle.xyz",
   explorer = "https://app.radicle.xyz",
 ) {
   return `${explorer}/nodes/${seed}/${path}`;