style(next): text notes: fix the table caption colors on dark theme

src/public/stylesheets/theme-next/notes/text.css

@@ -127,6 +127,13 @@ html .note-detail-editable-text :not(figure, .include-note, hr):first-child {
     border-top: 1px solid var(--main-border-color) !important;
 }
 
+/* Table caption */
+
+.ck-content .table > figcaption {
+    background: var(--accented-background-color);
+    color: var(--main-text-color);
+}
+
 /*
  * Search in text panel
  */