chore: update anvil-cmg catalog to anvil13 (#4684)

chore: update anvil-cmg catalog to anvil13 (#4683)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: MillenniumFalconMechanic

site-config/anvil-cmg/prod/config.ts

@@ -9,7 +9,7 @@ const config: SiteConfig = {
     "https://anvilproject.org",
     "https://service.explore.anvilproject.org",
     GIT_HUB_REPO_URL,
-    "anvil12"
+    "anvil13"
   ),
   exportToTerraUrl: "https://anvil.terra.bio/",
 };