Update components/stockchart/labels-template-and-format.md

Co-authored-by: Tsvetomir Hristov <[email protected]>

Author: ntacheva

components/stockchart/labels-template-and-format.md

@@ -34,7 +34,7 @@ Standard number format strings and rotate the labels of the Category Axis
     <StockChartCategoryAxes>
         <StockChartCategoryAxis BaseUnit="@ChartCategoryAxisBaseUnit.Months">
             <StockChartCategoryAxisLabels Format="{0:D}">
-                <StockChartCategoryAxisLabelsRotation Angle="30"></StockChartCategoryAxisLabelsRotation>
+                <StockChartCategoryAxisLabelsRotation Angle="30"/>
             </StockChartCategoryAxisLabels>
         </StockChartCategoryAxis>
     </StockChartCategoryAxes>