[PTRun][Calculator]Fix unit tests on non-english systems (#36569)

* fix tests

* update comment

src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator.UnitTest/QueryTests.cs

@@ -230,6 +230,7 @@ public void NoErrorForHumanMultiplicationExpressions(string typedString)
         public void RightAnswerForHumanMultiplicationExpressions(string typedString, double answer)
         {
             // Setup
+            typedString = typedString.Replace(".", CultureInfo.CurrentCulture.NumberFormat.CurrencyDecimalSeparator); // Workaround to get correct results when the tests are running on a non-english systems.
             Query expectedQuery = new(typedString);
             Query expectedQueryWithKeyword = new("=" + typedString, "=");