fix: add python code label

Author: lucifer

problems/1019.next-greater-node-in-linked-list.md

@@ -52,6 +52,8 @@ https://leetcode-cn.com/problems/next-greater-node-in-linked-list/submissions/
 
 用代码描述如下：
 
+Python Code:
+
 ```python
 def monoStack(list):
     st = []
@@ -70,6 +72,8 @@ monoStack([5, 4, 2, 1, 3]) # output: [5, 4, 3]
 
 ## 代码
 
+Python Code:
+
 ```python
 # Definition for singly-linked list.
 # class ListNode:

problems/1020.number-of-enclaves.md

@@ -59,6 +59,8 @@ https://leetcode-cn.com/problems/number-of-enclaves/
 
 ### 代码
 
+Python Code:
+
 ```python
 class Solution:
     temp = 0
@@ -112,6 +114,8 @@ class Solution:
 
 ### 代码
 
+Python Code:
+
 ```python
 #
 # @lc app=leetcode.cn id=1020 lang=python3

problems/1023.camelcase-matching.md

@@ -68,6 +68,8 @@ https://leetcode-cn.com/problems/camelcase-matching/
 
 > 给定字符串 s 和 t ，判断 s 是否为 t 的子序列
 
+Python Code:
+
 ```python
 class Solution:
     def isSubsequence(self, s: str, t: str) -> bool:
@@ -101,6 +103,8 @@ class Solution:
 
 ## 代码
 
+Python Code:
+
 ```python
 class Solution:
     def camelMatch(self, queries: List[str], pattern: str) -> List[bool]: