Fix config leader election configmap name

This will update the name of the configmap responsible for
controller to contain config of leader election

Based on the PR on pipeline upstream
tektoncd/pipeline#7014

pkg/reconciler/kubernetes/tektonpipeline/transform.go

@@ -43,7 +43,7 @@ const (
 	clusterResolverConfig                        = "cluster-resolver-config"
 	hubResolverConfig                            = "hubresolver-config"
 	gitResolverConfig                            = "git-resolver-config"
-	leaderElectionConfig                         = "config-leader-election"
+	leaderElectionConfig                         = "config-leader-election-controller"
 	pipelinesControllerDeployment                = "tekton-pipelines-controller"
 	pipelinesControllerContainer                 = "tekton-pipelines-controller"
 	pipelinesRemoteResolversControllerDeployment = "tekton-pipelines-remote-resolvers"