fix: catch the correct exception in Paginate

PluralKit.Bot/Utils/ContextUtils.cs

@@ -130,7 +130,7 @@ namespace PluralKit.Bot {
             // If we get an "Unauthorized" error, we don't have permissions to remove our reaction
             // which means we probably didn't add it in the first place, or permissions changed since then
             // either way, nothing to do here
-            catch (UnauthorizedException) { }
+            catch (ForbiddenException) { }
         }
         
         public static async Task<T> Choose<T>(this Context ctx, string description, IList<T> items, Func<T, string> display = null)