Fix amendement date when PLF is active

src/lib/components/budget/LawEdit.svelte

@@ -14,7 +14,10 @@
 
   const budgetConfig = $session.budget
   const CALCULATION_BASE_YEAR = budgetConfig.calculationBaseYear
-  const date = CALCULATION_BASE_YEAR + "-01-01"
+  const CALCULATION_PLF_YEAR = budgetConfig.calculationPlfYear
+  const date =
+    (CALCULATION_PLF_YEAR ? CALCULATION_PLF_YEAR : CALCULATION_BASE_YEAR) +
+    "-01-01"
 
   //Concatenating the parameters by parent node: