fix: Web 1616 make time stamp body bodysmall (#5046)

* copywriting change

* init

* remove prev change

src/nft/components/collection/Activity.css.ts

 import { style } from '@vanilla-extract/css'
-import { body, buttonTextMedium, subhead, subheadSmall } from 'nft/css/common.css'
+import { body, bodySmall, buttonTextMedium, subhead, subheadSmall } from 'nft/css/common.css'
 import { breakpoints, sprinkles, themeVars, vars } from 'nft/css/sprinkles.css'
 
 export const baseRow = style([
@@ -91,7 +91,7 @@ export const eventDetail = style([
 ])
 
 export const eventTime = style([
-  subheadSmall,
+  bodySmall,
   sprinkles({
     color: 'textSecondary',
   }),