fix(datetime): fonts now render consistently (#26281)

Author: liamdebeasi

core/src/components/datetime-button/test/overlays/datetime-button.e2e.ts-snapshots/datetime-overlay-popover-ios-ltr-Mobile-Chrome-linux.png

@@ -343,6 +343,8 @@ ion-picker-column-internal {
   background: none;
   color: currentColor;
 
+  font-family: $font-family-base;
+
   cursor: pointer;
 
   appearance: none;