Fix caption and standfirst fonts for Labs Gallery

Co-authored-by: Marjan Kalanaki <[email protected]>

Author: deedeeh

dotcom-rendering/src/components/Caption.tsx

@@ -211,7 +211,9 @@ const captionLink = css`
 `;
 
 const galleryStyles = css`
-	${grid.column.centre}
+	${grid.column.centre};
+	${textSans12};
+
 	margin-bottom: 0;
 	padding-bottom: 6px;
 	${from.leftCol} {

dotcom-rendering/src/components/Standfirst.tsx

@@ -12,6 +12,7 @@ import {
 	textSans17,
 	textSans20,
 	textSans24,
+	textSansBold15,
 } from '@guardian/source/foundations';
 import sanitise from 'sanitize-html';
 import { grid } from '../../src/grid';
@@ -83,6 +84,11 @@ const decideFont = ({ display, design, theme }: ArticleFormat) => {
 	const isLabs = theme === ArticleSpecial.Labs;
 	switch (design) {
 		case ArticleDesign.Gallery:
+			if (isLabs) {
+				return css`
+					${textSansBold15};
+				`;
+			}
 			return css`
 				${headlineBold17}
 			`;