Update kfp-tekton release to 1.3.1 (kubeflow#1033)

Author: Tomcli

.kfp-rebase-version

@@ -1 +1 @@
-1.8.1
+1.8.4

Makefile

@@ -16,7 +16,7 @@
 #  - The help target was derived from https://stackoverflow.com/a/35730328/5601796
 
 VENV ?= .venv
-KFP_TEKTON_RELEASE ?= v1.3.0
+KFP_TEKTON_RELEASE ?= v1.3.1
 export VIRTUAL_ENV := $(abspath ${VENV})
 export PATH := ${VIRTUAL_ENV}/bin:${PATH}
 DOCKER_REGISTRY ?= aipipeline

VERSION

@@ -1 +1 @@
-1.3.0
+1.3.1

guides/kfp_tekton_install.md

@@ -53,15 +53,15 @@ To install the standalone Kubeflow Pipelines with Tekton, run the following step
          -p '{"data":{"enable-custom-tasks": "true"}}'
    ```
 
-3. Install Kubeflow Pipelines with Tekton backend (`kfp-tekton`) `v1.3.0` [custom resource definitions](https://kubernetes.io/docs/concepts/extend-kubernetes/api-extension/custom-resources/)(CRDs).
+3. Install Kubeflow Pipelines with Tekton backend (`kfp-tekton`) `v1.3.1` [custom resource definitions](https://kubernetes.io/docs/concepts/extend-kubernetes/api-extension/custom-resources/)(CRDs).
    > Note: You can ignore the error `no matches for kind "Application" in version "app.k8s.io/v1beta1"` since it's a warning saying `application` CRD is not yet ready.
     ```shell
-    kubectl apply --selector kubeflow/crd-install=true -f install/v1.3.0/kfp-tekton.yaml
+    kubectl apply --selector kubeflow/crd-install=true -f install/v1.3.1/kfp-tekton.yaml
     ```
 
-4. Install Kubeflow Pipelines with Tekton backend (`kfp-tekton`) `v1.3.0` deployment
+4. Install Kubeflow Pipelines with Tekton backend (`kfp-tekton`) `v1.3.1` deployment
     ```shell
-    kubectl apply -f install/v1.3.0/kfp-tekton.yaml
+    kubectl apply -f install/v1.3.1/kfp-tekton.yaml
     ```
 
 5. Then, if you want to expose the Kubeflow Pipelines endpoint outside the cluster, run the following commands: