Fix tests

apps/api/src/services/exchange-rate-data/exchange-rate-data.service.mock.ts

@@ -7,14 +7,14 @@ export const ExchangeRateDataServiceMock = {
   }): Promise<any> => {
     if (targetCurrency === 'CHF') {
       return Promise.resolve({
-        CHF: {
+        CHFCHF: {
           '2015-01-01': 1,
           '2017-12-31': 1,
           '2018-01-01': 1,
           '2023-01-03': 1,
           '2023-07-10': 1
         },
-        USD: {
+        USDCHF: {
           '2015-01-01': 0.9941099999999999,
           '2017-12-31': 0.9787,
           '2018-01-01': 0.97373,