docs: replace legacy line‑dot‑left‑horizontal icons with unified dot icon across docs

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Prad Nukala committed 2026-09-25 13:17:35 -04:00
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---
title: '125. Valid Palindrome'
description: A phrase is a palindrome if, after converting all uppercase letters into lowercase letters and removing all non-alphanumeric characters, it reads the same forward and backward. Alphanumeric characters include letters and numbers
icon: line-dot-left-horizontal
icon: dot
sidebar:
label: 'Valid Palindrome'
badge: 'Easy'