fix: task status loop (backport #26006) (#29821)

Co-authored-by: Rucha Mahabal <ruchamahabal2@gmail.com>
Co-authored-by: Jannat Patel <31363128+pateljannat@users.noreply.github.com>

erpnext/projects/doctype/task/task.py

@@ -76,9 +76,6 @@ class Task(NestedSet):
 		if flt(self.progress or 0) > 100:
 			frappe.throw(_("Progress % for a task cannot be more than 100."))
 
-		if flt(self.progress) == 100:
-			self.status = 'Completed'
-
 		if self.status == 'Completed':
 			self.progress = 100