Task/localize number formatting of y-axis labels in line chart component (#5624)

* Localize number formatting of y-axis labels in line chart component

* Update changelog

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Localized the number formatting of the y-axis labels in the line chart component
 - Improved the wording of the 4% rule in the _FIRE_ section
 - Improved the language localization for German (`de`)
 

libs/ui/src/lib/line-chart/line-chart.component.ts

@@ -261,7 +261,10 @@ export class GfLineChartComponent
                       }
 
                       if (typeof tickValue === 'number') {
-                        return tickValue.toFixed(2);
+                        return tickValue.toLocaleString(this.locale, {
+                          maximumFractionDigits: 2,
+                          minimumFractionDigits: 2
+                        });
                       }
 
                       return tickValue;