fix: typo in salary register report field name (#16670)

When assigning salary slip field values to row list for salary register, line 22, the field was incorrectly spelled.  The correct value in the Salary Slip DocType is `leave_without_pay`, and this change reflects this. Line 27 also reflects this adjustment.
diff --git a/erpnext/hr/report/salary_register/salary_register.py b/erpnext/hr/report/salary_register/salary_register.py
index 237c5e2..0c42150 100644
--- a/erpnext/hr/report/salary_register/salary_register.py
+++ b/erpnext/hr/report/salary_register/salary_register.py
@@ -19,12 +19,12 @@
 	data = []
 	for ss in salary_slips:
 		row = [ss.name, ss.employee, ss.employee_name, ss.branch, ss.department, ss.designation,
-			ss.company, ss.start_date, ss.end_date, ss.leave_withut_pay, ss.payment_days]
+			ss.company, ss.start_date, ss.end_date, ss.leave_without_pay, ss.payment_days]
 
 		if not ss.branch == None:columns[3] = columns[3].replace('-1','120')
 		if not ss.department  == None: columns[4] = columns[4].replace('-1','120')
 		if not ss.designation  == None: columns[5] = columns[5].replace('-1','120')
-		if not ss.leave_withut_pay  == None: columns[9] = columns[9].replace('-1','130')
+		if not ss.leave_without_pay  == None: columns[9] = columns[9].replace('-1','130')
 
 
 		for e in earning_types:
@@ -115,4 +115,4 @@
 		ss_ded_map.setdefault(d.parent, frappe._dict()).setdefault(d.salary_component, [])
 		ss_ded_map[d.parent][d.salary_component] = flt(d.amount)
 
-	return ss_ded_map
\ No newline at end of file
+	return ss_ded_map