Update dependency astro-seo to v0.8.4

Author: renovate[bot]

package.json

@@ -23,7 +23,7 @@
     "@unocss/preset-attributify": "0.59.4",
     "@unocss/preset-wind": "0.59.4",
     "astro-robots-txt": "0.5.0",
-    "astro-seo": "0.8.3",
+    "astro-seo": "0.8.4",
     "autoprefixer": "10.4.19",
     "cspell": "6.31.3",
     "cssnano": "6.1.2",