chore(deps): pin dependency astro to 5.15.2 (#83)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -116,7 +116,7 @@
     "@types/wallabyjs": "0.0.15",
     "@types/yargs": "17.0.34",
     "asciinema-player": "3.12.1",
-    "astro": "^5.15.2",
+    "astro": "5.15.2",
     "bupkis": "0.12.0",
     "cspell": "9.2.2",
     "eslint": "9.38.0",