fix: Sender email in process statements of accounts

(cherry picked from commit 65a2f3d)

erpnext/accounts/doctype/process_statement_of_accounts/process_statement_of_accounts.py

@@ -455,11 +455,16 @@ def send_emails(document_name, from_scheduler=False, posting_date=None):
 			subject = frappe.render_template(doc.subject, context)
 			message = frappe.render_template(doc.body, context)
 
+			if doc.sender:
+				sender_email = frappe.db.get_value("Email Account", doc.sender, "email_id")
+			else:
+				sender_email = frappe.session.user
+
 			frappe.enqueue(
 				queue="short",
 				method=frappe.sendmail,
 				recipients=recipients,
-				sender=doc.sender or frappe.session.user,
+				sender=sender_email,
 				cc=cc,
 				subject=subject,
 				message=message,