Merge pull request #19988 from rohitwaghchaure/change_log_for_v12_3_0

feat: v12_3_0 change log

erpnext/change_log/v12/v12_3_0.md

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+# Version 12.3.0 Release Notes
+
+### Accounting
+
+1. Statewise GST taxation for India
+	- Added GST state in the tax category
+	- Added tax category in the address, sales/purchase tax template
+	- Based on the address system will fetch the tax template
+2. Accounts Payable report based on payment terms
+3. Trial Balance Report with filter "Party Name"
+4. Fixed asset register report with date filters
+
+### CRM
+
+1. Appointment Scheduling
+    - Configure the appointment slots using Appointment Booking Settings
+    - Users can book the appointment through the portal based on slot availability
+
+### HR
+
+1. Refactored Employee Attendance Tool
+2. Set allocated amount in employee advance as per total amount
+
+### Fixes
+
+1. Stock entry decimal issue while creating the GL entries
+2. Item wise stock balance report
+3. Valuation of subcontracting finished good item
+4. Not able to create Instructor, Student entries
+5. Pricing rule for a product discount
+6. POS for serialized items
+7. Not able to cancel share transfer entry
+8. Ledger entries for compensatory off were not getting created