[#6511] CodeQL alert SM02200: Weak hmacs - Suppress alert for WebexClientWrapper

libraries/Adapters/Microsoft.Bot.Builder.Adapters.Webex/WebexClientWrapper.cs

@@ -72,7 +72,7 @@ public virtual bool ValidateSignature(HttpRequest request, string jsonPayload)
                 : throw new InvalidOperationException($"HttpRequest is missing \"{SparkSignature}\"");
 
 #pragma warning disable CA5350 // Webex API uses SHA1 as cryptographic algorithm.
-            using (var hmac = new HMACSHA1(Encoding.UTF8.GetBytes(Options.WebexSecret)))
+            using (var hmac = new HMACSHA1(Encoding.UTF8.GetBytes(Options.WebexSecret))) //lgtm[cs/weak-encryption]
             {
                 var hashArray = hmac.ComputeHash(Encoding.UTF8.GetBytes(jsonPayload));
                 var hash = BitConverter.ToString(hashArray).Replace("-", string.Empty).ToUpperInvariant();