fix: link black preview instead of color-primary

Signed-off-by: Aridhi-Dhia-eddine <[email protected]>

Author: Aridhi-Dhia-eddine

apps/files/src/views/ReferenceFileWidget.vue

@@ -256,7 +256,7 @@ export default defineComponent({
 .widget-file {
 	display: flex;
 	flex-grow: 1;
-	color: var(--color-main-text) !important;
+	color: #007bff !important;
 	text-decoration: none !important;
 	padding: 0 !important;