Rename 'ct' to 'cancellationToken' for clarity

Updated the parameter name in the `InvokeRecActionAsync` method
to `cancellationToken` for better readability and alignment
with standard naming conventions. Adjusted the method signature
and internal usage to reflect this change.

src/ReC.Client/ReCClient.cs

@@ -23,11 +23,11 @@ namespace ReC.Client
         /// POST api/RecAction/invoke/{profileId}
         /// </summary>
         /// <param name="profileId"></param>
-        /// <param name="ct"></param>
+        /// <param name="cancellationToken"></param>
         /// <returns></returns>
-        public async Task InvokeRecActionAsync(int profileId, CancellationToken ct = default)
+        public async Task InvokeRecActionAsync(int profileId, CancellationToken cancellationToken = default)
         {
-            var resp = await _http.PostAsync($"api/RecAction/invoke/{profileId}", content: null, ct);
+            var resp = await _http.PostAsync($"api/RecAction/invoke/{profileId}", content: null, cancellationToken);
             resp.EnsureSuccessStatusCode();
         }
     }