Correct styling of syntax highlighter .section elements (#1984)

Fixes styling of syntax highlighter .section elements which causes unsightly rendering due to a global definition by bulma.

gradle/changelog/highlighter_styling.yaml

@@ -0,0 +1,2 @@
+- type: fixed
+  description: Correct styling of syntax highlighter .section elements ([#1984](https://github.com/scm-manager/scm-manager/pull/1984))

scm-ui/ui-components/src/SyntaxHighlighterRenderer.tsx

@@ -61,6 +61,10 @@ const RowContainer = styled.div`
   &:hover i {
     visibility: visible;
   }
+  // override bulma default styling of .section
+  .section {
+    padding: 0;
+  }
 `;
 
 type CreateLinePermaLinkFn = (lineNumber: number) => string;