Use same chevron on index (#2924)

Author: bkeepers

src/lib/output/themes/default/partials/icon.tsx

@@ -61,6 +61,7 @@ export interface Icons extends Record<ReflectionKind, () => JSX.Element> {
     checkbox(): JSX.Element;
     menu(): JSX.Element;
     search(): JSX.Element;
+    /** @deprecated */
     chevronSmall(): JSX.Element;
     anchor(): JSX.Element;
     folder(): JSX.Element;

src/lib/output/themes/default/partials/index.tsx

@@ -45,7 +45,7 @@ export function index(context: DefaultThemeRenderContext, props: ContainerReflec
                 <section class="tsd-panel tsd-index-panel">
                     <details class="tsd-index-content tsd-accordion" open={true}>
                         <summary class="tsd-accordion-summary tsd-index-summary">
-                            {context.icons.chevronSmall()}
+                            {context.icons.chevronDown()}
                             <h5 class="tsd-index-heading uppercase">
                                 {i18n.theme_index()}
                             </h5>