docs: fix method slug

Author: Whipstickgostop

streamerbot/3.api/3.csharp/3.methods/twitch/chat/twitch-chat-pin-message.md

@@ -0,0 +1,33 @@
+---
+name: TwitchChatPinChatMessage
+title: TwitchChatPinChatMessage
+description: Pins a chat message in Twitch
+version: 1.0.5
+parameters:
+  - name: messageId
+    description: Twitch chat message ID to pin
+  - name: duration
+    default: null
+    description: |
+      The duration to pin the chat message for.
+      - `null` for the pin to last till the end of the stream
+      - between `30` and `1800` - duration in seconds
+example: |
+  using System;
+  public class CPHInline
+  {
+      public bool Execute()
+      {
+          // get the message id from an argument
+          if (!CPH.TryGetValue<string>("msgId", out var msgId))
+          {
+              return false;
+          }
+
+          // pin the chat message till the end of the stream
+          CPH.TwitchChatPinChatMessage(msgId);
+
+          return true;
+      }
+  }
+---