Explicitly install iconify packages

Cloudflare seems to be unable to fetch icons at build time otherwise

Author: yuri91

pnpm-lock.yaml

@@ -19,6 +19,7 @@
 		"@astrojs/svelte": "^5.4.0",
 		"@astrojs/tailwind": "^5.1.0",
 		"@astropub/md": "^0.4.0",
+		"@iconify-json/ri": "^1.2.6",
 		"@leaningtech/astro-theme": "workspace:^",
 		"@leaningtech/cheerp-ts-three-demo": "workspace:^",
 		"@leaningtech/cheerpj-applet-page": "workspace:^",