Fix pagination in provider list

Signed-off-by: Juan Antonio Osorio <[email protected]>

internal/controlplane/handlers_providers.go

@@ -138,7 +138,7 @@ func (s *Server) ListProviders(ctx context.Context, req *minderv1.ListProvidersR
 	}
 
 	cursor := ""
-	if len(list) > 0 {
+	if len(list) > 0 && len(list) == int(params.Limit) {
 		c := cursorutil.ProviderCursor{
 			CreatedAt: list[len(list)-1].CreatedAt,
 		}