Why is there no ordinary ṣilah in وَيُعَلِّمُهُ الْكِتَابَ?

Rules of Hāʾ al-Ḍamīr: Vowels, Ṣilah and Exceptions

• Hāʾ has sukūn
• The pronounced lām after hamzat al-waṣl is sākin
• A yāʾ immediately precedes hāʾ
• It is in Sūrat al-Fatḥ