fix compiler error for fixed array list copy ctor

src/fsfw/container/FixedArrayList.h

@@ -20,7 +20,9 @@ class FixedArrayList : public ArrayList<T, count_t> {
   FixedArrayList() : ArrayList<T, count_t>(data, MAX_SIZE) {}
 
   FixedArrayList(const FixedArrayList& other) : ArrayList<T, count_t>(data, MAX_SIZE) {
-    memcpy(this->data, other.data, sizeof(this->data));
+    for (size_t idx = 0; idx < sizeof(data); idx++) {
+      data[idx] = other.data[idx];
+    }
     this->entries = data;
     this->size = other.size;
   }