Upgrade to latest Astro (v7)

package.json

@@ -9,19 +9,19 @@
     "astro": "astro"
   },
   "dependencies": {
-    "@astrojs/mdx": "^4.3.1",
-    "@astrojs/node": "^9.4.3",
-    "@astrojs/sitemap": "^3.4.2",
+    "@astrojs/mdx": "^8.0.3",
+    "@astrojs/node": "^11.1.7",
+    "@astrojs/sitemap": "^3.7.4",
     "@iconify-json/fa": "^1.2.1",
     "@iconify-json/fa7-brands": "^1.2.0",
     "@iconify-json/fa7-solid": "^1.2.0",
     "@iconify-json/mdi": "^1.2.3",
     "@iconify-json/simple-icons": "^1.2.44",
     "@tailwindcss/vite": "^4.1.11",
-    "astro": "^5.18.2",
+    "astro": "^7.3.8",
     "astro-icon": "^1.1.5",
     "astro-robots-txt": "^1.0.0",
-    "astro-seo-schema": "^5.1.0",
+    "astro-seo-schema": "^7.0.1",
     "get-audio-duration": "^4.0.1",
     "nodemailer": "^7.0.5",
     "schema-dts": "^1.1.5",
@@ -29,7 +29,7 @@
   },
   "devDependencies": {
     "@cspell/dict-en-au": "^1.1.4",
-    "@shikijs/transformers": "^3.9.2",
+    "@shikijs/transformers": "^4.5.0",
     "@types/howler": "^2.2.12",
     "@types/nodemailer": "^7.0.1",
     "@typescript-eslint/eslint-plugin": "^8.38.0",