Update Trustee Timeline to reflect recent changes (#4)

* Update to reflect recent Trustee changes

- Add end dates for Pip and Yo
- Add start dates for Marion and Kirsty

I've used the same colours for Marion and Kirsty that have been used previously for consistency.

I used the dates that each trustee officially started/ended their term according to the updates to the charity commission records.

* Change Kirsty and Marion's cohort

- Use the colour of the current trustee cohort, rather than their previous cohort colour

Author: mdsimpson42

index.html

@@ -97,8 +97,8 @@
         ['Yo Yehudi', '', palette[7], agm_2024, new Date("2025-01-30")],
 
         // temporarily appointed after other trustees stood down (2025)
-        ['Kirsty Pringle', '', palette[3], new Date("2025-06-20"), current],
-        ['Marion Weinzierl', '', palette[3], new Date("2025-05-23"), current],
+        ['Kirsty Pringle', '', palette[7], new Date("2025-06-20"), current],
+        ['Marion Weinzierl', '', palette[7], new Date("2025-05-23"), current],
     ];
     dataTable.addRows(trustees);