Updated Past Events Font-Color to Primary for Visibility (#5572)

Issue: [#5164](#5164)

Updated font-color of the title of past calendar events to be primary to
improve visibility. Calendar event time font-color remains unchanged.

Before:

![image](https://github.com/twentyhq/twenty/assets/47053579/8556eefb-d79e-4924-a15b-1609c0720aa3)

After:

![image](https://github.com/twentyhq/twenty/assets/47053579/a2d3639c-0a04-4db6-998e-f76b01e1e392)

The year in month-year at the top of these screenshots also appears to
be in tertiary font-color which can be adjusted too if that feels not
visible enough.

---------

Co-authored-by: ktang520 <ktang520@gmail.com>
Co-authored-by: Félix Malfait <felix.malfait@gmail.com>

packages/twenty-front/src/modules/activities/calendar/components/CalendarEventRow.tsx

@@ -48,14 +48,15 @@ const StyledAttendanceIndicator = styled.div<{ active?: boolean }>`
 const StyledLabels = styled.div`
   align-items: center;
   display: flex;
-  color: ${({ theme }) => theme.font.color.tertiary};
+  color: ${({ theme }) => theme.font.color.primary};
   gap: ${({ theme }) => theme.spacing(2)};
   flex: 1 0 auto;
 `;
 
 const StyledTime = styled.div`
   align-items: center;
   display: flex;
+  color: ${({ theme }) => theme.font.color.tertiary};
   gap: ${({ theme }) => theme.spacing(1)};
   width: ${({ theme }) => theme.spacing(26)};
 `;