Update huawei-holosense-panel template with improved metadata and structure

- Added reference to official Huawei product page
- Fixed max-request vs max-requests field naming for consistency
- Added panel and iot tags for better categorization
- Enhanced template structure following review guidelines

http/exposed-panels/huawei-holosense-panel.yaml

@@ -6,8 +6,10 @@ info:
   author: darses
   description: |
     Detects login panel of Huawei HoloSens SDC, a software-based Internet of Things camera with a modern and high-quality appearance.
+  reference:
+    - https://www.huawei.com/en/products/intelligent-devices/holosens-sdc
   metadata:
-    max-requests: 3
+    max-request: 3
     vendor: huawei
     product: holosense_sdc
     shodan-query:
@@ -16,7 +18,7 @@ info:
     fofa-query:
       - '"Server: SDC Server" && protocol="https"'
       - '"Server: WebServer/1.0.0" && port="1443"'
-  tags: detect,huawei,holosens
+  tags: panel,detect,huawei,holosens,iot
 
 flow: http(1) && http(2) && http(3)