upgrade keywords

.pre-commit-config.yaml

 repos:
   - repo: git@codechina.csdn.net:csdn/skill_tree_hook.git
-    rev: 1420892936081c5885a8a27d3b6486c14c1be577
+    rev: c1fbfe8805a7754a9d5c85bcf0b112ddad086075
     hooks:
       - id: pre-commit
         verbose: true
\ No newline at end of file

data/2.PostgreSQL中阶/1.PostgreSQL数据库的基本结构/4.索引和约束/config.json

 {
   "node_id": "pg-eeb777ca54434480a06bfe7fc5e7d3ca",
-  "keywords": [],
+  "keywords": ["索引", " 约束", "constraints", "index"],
   "children": [],
   "export": ["primary_key.json","unique.json", "unique_2.json"]
 }
\ No newline at end of file

data/3.PostgreSQL高阶/3.SQL高级技巧/6.索引和优化/config.json

 {
   "node_id": "pg-79fe660f35f4469481db38509343c2b7",
-  "keywords": [],
+  "keywords": ["索引", "index", "performance", "优化"],
   "children": [],
   "export": [
     "daily_payment.json",