fix: develop version should be 12 (#15928)

diff --git a/erpnext/hooks.py b/erpnext/hooks.py
index 2005147..47a7044 100644
--- a/erpnext/hooks.py
+++ b/erpnext/hooks.py
@@ -11,7 +11,7 @@
 app_license = "GNU General Public License (v3)"
 source_link = "https://github.com/frappe/erpnext"
 
-develop_version = '11.x.x-develop'
+develop_version = '12.x.x-develop'
 staging_version = '11.0.3-beta.19'
 
 error_report_email = "support@erpnext.com"