Change dateline colour in galleries

Author: ioannakok

dotcom-rendering/src/paletteDeclarations.ts

@@ -979,7 +979,7 @@ export const tabs = {
 const datelineLight: PaletteFunction = ({ design, theme }) => {
 	switch (design) {
 		case ArticleDesign.Gallery:
-			return sourcePalette.neutral[86];
+			return sourcePalette.neutral[60];
 		case ArticleDesign.Comment:
 		case ArticleDesign.Editorial:
 		case ArticleDesign.Letter: