message: [Doc] Pagination: fix prev-text prop
diff: v-model="currentPage1"
  :total-items="24"
  :items-per-page="5"
  - :previous-text= "$t('prevText')"
  + :prev-text= "$t('prevText')"
  :next-text= "$t('nextText')"
  />
  </demo-block>
  <van-pagination
  v-model="currentPage2"
  :page-count="12"
  - :previous-text= "$t('prevText')"
  + :prev-text= "$t('prevText')"
  :next-text= "$t('nextText')"
  mode="simple"
  size="small"
  v-model="currentPage3"
  :total-items="125"
  :show-page-size="3"
  - :previous-text= "$t('prevText')"
  + :prev-text= "$t('prevText')"
  :next-text= "$t('nextText')"
  />
  </demo-block>
  