Fix bad mistake on previous commit...

src/lib/situations.ts

@@ -303,7 +303,7 @@ export function setSituationVariableValue(
   ) {
     return false
   }
-  if ((variable.name = "date_naissance")) {
+  if (variable.name === "date_naissance") {
     valueByPeriod[year] = value
   } else {
     valueByPeriod[year - 2] = value