chore: Added change log for v12.21.0

erpnext/change_log/v12/v12_21_0.md

@@ -0,0 +1,21 @@
+## Version 12.21.0 Release Notes
+
+
+### Fixes & Enhancements
+
+- Incorrect qty calculated for sub-contracted raw materials in purchase receipt ([#25443](https://github.com/frappe/erpnext/pull/25443))
+- Update cost center in the item table fetched from POS Profile in v12 ([#25612](https://github.com/frappe/erpnext/pull/25612))
+- Total stock summary report not working ([#25552](https://github.com/frappe/erpnext/pull/25552))
+- Timeout error while loading warehouse tree ([#25693](https://github.com/frappe/erpnext/pull/25693))
+- RCM rounding precision ([#25410](https://github.com/frappe/erpnext/pull/25410))
+- Change subcontracted item display ([#25426](https://github.com/frappe/erpnext/pull/25426))
+- Remove invalid changes added due to merge conflict ([#25437](https://github.com/frappe/erpnext/pull/25437))
+- Add document type field for e-invoicing (Italy) ([#25420](https://github.com/frappe/erpnext/pull/25420))
+- Issue in project custom status ([#25453](https://github.com/frappe/erpnext/pull/25453))
+- Employee Separation ([#25504](https://github.com/frappe/erpnext/pull/25504))
+- State code for Other Territory ([#25422](https://github.com/frappe/erpnext/pull/25422))
+- Remove invalid changes added due to merge conflict ([#25405](https://github.com/frappe/erpnext/pull/25405))
+- Check for None in item.schedule_date before setting ([#25589](https://github.com/frappe/erpnext/pull/25589))
+- Can't multiply sequence by non-int of type 'float' ([#25385](https://github.com/frappe/erpnext/pull/25385))
+- Filter using purpose, make requested changes ([#25388](https://github.com/frappe/erpnext/pull/25388))
+- Purchase from registered composition dealer ([#25419](https://github.com/frappe/erpnext/pull/25419))