Merge pull request #1290 from vim-jp/dependabot/npm_and_yarn/astro-5.15.6

build(deps): bump astro from 5.15.4 to 5.15.6

Author: github-actions[bot]

package.json

@@ -26,7 +26,7 @@
     "@fontsource/kaushan-script": "^5.2.8",
     "@fontsource/yuji-syuku": "^5.2.7",
     "@unocss/reset": "^66.5.5",
-    "astro": "^5.15.4",
+    "astro": "^5.15.6",
     "chart.js": "^4.5.1",
     "dayjs": "^1.11.19",
     "sharp": "^0.34.5",