Update MetricsSummaryTab.js

Author: Zaroastre

src/main/js/components/MetricsSummaryTab/MetricsSummaryTab.js

@@ -39,7 +39,7 @@ const metricKeysTabF90 = [
 	'icode-f90-loc-mean',
 	'icode-f90-loc-max'];
 
-const metricKeysTabSH = [
+const metricKeysTabShell = [
 	'icode-shell-nesting-min',
 	'icode-shell-nesting-mean',
 	'icode-shell-nesting-max',
@@ -314,4 +314,4 @@ class MetricsSummaryTab extends React.Component {
     };
 }
 
-export default MetricsSummaryTab;
+export default MetricsSummaryTab;