chore: update LungMAP default catalog to lm8 (#4333)

Author: NoopDog

site-config/lungmap/prod/config.ts

@@ -10,7 +10,7 @@ import { makeConfig } from "../dev/config";
 const BROWSER_URL = "https://data-browser.lungmap.net";
 const DATA_URL = HCA_DATA_URL;
 const PORTAL_URL = HCA_PORTAL_URL;
-const CATALOG = "lm7";
+const CATALOG = "lm8";
 
 const config: SiteConfig = {
   ...makeConfig(BROWSER_URL, PORTAL_URL, DATA_URL, GIT_HUB_REPO_URL, CATALOG),