Fixed switch case in FileHandling to account for the new expense categories

src/main/java/no/ntnu/idatt1002/demo/data/Economics/FileHandling.java

@@ -134,8 +134,11 @@ public class FileHandling{
                     line = line.replace(FileHandling.category, "");
                     expenseCategory = switch (line) {
                         case "FOOD" -> ExpenseCategory.FOOD;
+                        case "RENT" -> ExpenseCategory.RENT;
                         case "CLOTHES" -> ExpenseCategory.CLOTHES;
                         case "BOOKS" -> ExpenseCategory.BOOKS;
+                        case "HEALTH" -> ExpenseCategory.HEALTH;
+                        case "ACTIVITIES" -> ExpenseCategory.ACTIVITIES;
                         default -> ExpenseCategory.OTHER;
                     };
                 }