Updating github-config (#61)

Co-authored-by: paketo-bot <paketobuildpacks@gmail.com>
Co-authored-by: Samuel Gaist <samuel.gaist@idiap.ch>

Author: 3 people

scripts/.util/tools.json

@@ -2,5 +2,5 @@
   "createpackage": "v1.73.0",
   "jam": "v2.15.2",
   "libpaktools": "v0.3.0",
-  "pack": "v0.39.1"
+  "pack": "v0.40.0"
 }