add a repository in sig-knowledge

Signed-off-by: Nkeven <likai20@iscas.ac.cn>

sig/sig-knowlege/sig_knowledge.md

@@ -19,7 +19,8 @@ Note: The content of this SIG follows the convention described in OpenHarmony's
 
 ## The repository
 - project name：
-  - knowledge：https://gitee.com/openharmony-sig/online_event
+  - https://gitee.com/openharmony-sig/knowledge_demo_smart_home
+  - https://gitee.com/openharmony-sig/online_event
 
 ## SIG Members
 

sig/sig-knowlege/sig_knowledge_cn.md

@@ -19,7 +19,8 @@
 
 ## 代码仓
 - 代码仓地址：
-  - knowledge：https://gitee.com/openharmony-sig/online_event
+  - https://gitee.com/openharmony-sig/knowledge_demo_smart_home
+  - https://gitee.com/openharmony-sig/online_event
 
 ## SIG组成员
 

sig/sigs.json

@@ -525,15 +525,17 @@
             "third_party/glfw"
          ]
       },
-	  {
-		 "sig-name": "sig-knowlege",
+        {
+         "sig-name": "sig-knowlege",
          "projects": [
-		 "https://gitee.com/openharmony-sig/online_event"
-	     ],
-		 "project-path":[
-		 "NONE"
-		 ]
-	  },
+         "https://gitee.com/openharmony-sig/online_event",
+         "https://gitee.com/openharmony-sig/knowledge_demo_smart_home"
+         ],
+          "project-path":[
+         "NONE",
+         "NONE"
+         ]
+        },
      {
       "sig-name":"sig-ai_framework_integration",
       "projects":["https://gitee.com/openharmony-sig/ai_framework_integration"