Shrinks the rounding on the Changes column bar

src/webviews/apps/plus/graph/graph.scss

@@ -38,7 +38,7 @@ body {
 	--color-graph-stats-deleted: var(--vscode-gitDecoration-deletedResourceForeground);
 	--color-graph-stats-files: var(--vscode-gitDecoration-modifiedResourceForeground);
 	--graph-stats-bar-height: 40%;
-	--graph-stats-bar-border-radius: 5px;
+	--graph-stats-bar-border-radius: 3px;
 }
 
 ::-webkit-scrollbar-corner {