chore(internal): version bump

stainless-app[bot] · stainless-app[bot] · commit 811d9b63cef2 · 2025-07-16T20:05:46.000Z
diff --git a/Gemfile.lock b/Gemfile.lock
@@ -11,7 +11,7 @@ GIT
 PATH
   remote: .
   specs:
-    orb-billing (1.5.1)
+    orb-billing (1.6.0)
       connection_pool
 
 GEM
