fix: Adjust chart styles in high contrast theme (kyma-project#3734)

* Adjust chart styles in high contrast theme

* Adjust chart styles in high contrast theme

Author: akucharska

public/themes/hcb.css

@@ -3,4 +3,9 @@
 html,
 #root {
   height: 100%;
+}
+
+.recharts-radial-bar-background-sector{
+  stroke: var(--sapTextColor);
+  stroke-width: 1.5;
 }

public/themes/hcw.css

@@ -3,4 +3,9 @@
 html,
 #root {
     height: 100%;
-}
+}
+
+.recharts-radial-bar-background-sector{
+    stroke: var(--sapTextColor);
+    stroke-width: 1;
+  }

src/shared/components/UI5RadialChart/UI5RadialChart.js

@@ -24,6 +24,7 @@ export const UI5RadialChart = ({
   return (
     <div className={classnames} onClick={onClick}>
       <RadialChart
+        accessibleName={'Radial chart'}
         displayValue={text}
         displayValueStyle={{
           fontSize: textSize,
@@ -38,8 +39,8 @@ export const UI5RadialChart = ({
           width: size + 'px',
         }}
         chartConfig={{
-          innerRadius: '99%',
-          outerRadius: '99%',
+          innerRadius: '98%',
+          outerRadius: '98%',
           barSize: 12,
         }}
       />