Upgrade Fern version from 3.48.2 to 4.15.5 (#101)

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Author: jon-fern

fern/fern.config.json

@@ -1,4 +1,4 @@
 {
   "organization": "plantstore",
-  "version": "3.48.2"
+  "version": "4.15.5"
 }