update date of summer hakken, fix autumn hakken month

_data/hakken.yml

@@ -26,6 +26,9 @@ dates:
   - name: Summer 2024
     id: summer-2024
     theme: Hot CPU Summer
+    override_date:
+      start: '2024-08-23'
+      end: '2024-08-25'
     location:
       en: Cologne @ [MiOM space](https://miom.space)
       de: Köln @ [MiOM Kreativraum](https://miom.space)

_includes/HakkenDates.tsx

@@ -16,9 +16,16 @@ const getStartAndEnd = (date) => {
     Winter: 1,
     Spring: 4,
     Summer: 7,
-    Autumn: 10,
+    Autumn: 11,
   }[version];
 
+  if (date.override_date) {
+    return {
+      start: new Date(date.override_date.start),
+      end: new Date(date.override_date.end)
+    };
+  }
+
   // We start searching on the 20th of that specific month
   const d = new Date();
   d.setFullYear(parseInt(year, 10));