添加自动json检查

和上个提交类似，此actions配置文件让github自动检查语法。

.github/workflow/Json_check.yml

@@ -0,0 +1,17 @@
+name: JSON check
+run-name: JSON check
+on:
+  push:
+    paths:
+      - '**.json'
+  pull_request:
+    branches: master
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: json-syntax-check
+        uses: limitusus/json-syntax-check@v2
+        with:
+          pattern: "\\.json$"