fix(deps): update astro monorepo

Author: renovate[bot]

bun.lock

@@ -31,13 +31,13 @@
     "@ascorbic/feed-loader": "^2.0.1",
     "@astrojs/check": "^0.9.8",
     "@astrojs/cloudflare": "^13.1.1",
-    "@astrojs/mdx": "5.0.4",
+    "@astrojs/mdx": "5.0.6",
     "@astrojs/rss": "4.0.18",
-    "@astrojs/sitemap": "3.7.2",
+    "@astrojs/sitemap": "3.7.3",
     "@iconify-json/pixel": "^1.2.1",
     "@types/p5": "^1.7.6",
     "@webtui/css": "^0.1.5",
-    "astro": "6.3.1",
+    "astro": "6.4.3",
     "beautiful-mermaid": "^1.0.0",
     "marked": "^18.0.0",
     "mdast-util-mdx-jsx": "^3.2.0",