Merge pull request #666 from deminy/ext-bsdiff-v0.2.1

upgrade the bsdiff extension to v0.2.1, with PHP 8.5 support added

Author: mnapoli

layers/bsdiff/config.json

@@ -2,6 +2,7 @@
     "php": [
         "82",
         "83",
-        "84"
+        "84",
+        "85"
     ]
 }