chore: fix doc indentation

Signed-off-by: Bird <[email protected]>

Author: aFlyBird0

docs/core-concepts/config.md

@@ -101,16 +101,16 @@ For example, given config:
 ```yaml
 tools:
 - name: trello
-instanceID: default
-options:
-  board:
-    name: golang-demo-board
-    apikey: xxx
-    token: xxx
-  scm:
-    owner: IronCore864
-    repo: golang-demo
-    scmType: github
+  instanceID: default
+  options:
+    board:
+      name: golang-demo-board
+      apikey: xxx
+      token: xxx
+    scm:
+      owner: IronCore864
+      repo: golang-demo
+      scmType: github
  ```
 
 - `TOOL_NAME` is "trello"

docs/core-concepts/config.zh.md

@@ -108,7 +108,7 @@ tools:
       owner: IronCore864
       repo: golang-demo
       scmType: github
- ```
+```
 
 - `TOOL_NAME` 是 "trello"
 - `TOOL_INSTANCE_ID` 是 "default"