chore(deps): Update cft/developer-tools Docker tag to v1.21

Author: renovate[bot]

Makefile

@@ -18,7 +18,7 @@
 # Make will use bash instead of sh
 SHELL := /usr/bin/env bash
 
-DOCKER_TAG_VERSION_DEVELOPER_TOOLS := 1.20
+DOCKER_TAG_VERSION_DEVELOPER_TOOLS := 1.21
 DOCKER_IMAGE_DEVELOPER_TOOLS := cft/developer-tools
 REGISTRY_URL := gcr.io/cloud-foundation-cicd
 

build/int.cloudbuild.yaml

@@ -188,7 +188,7 @@ tags:
 - 'integration'
 substitutions:
   _DOCKER_IMAGE_DEVELOPER_TOOLS: 'cft/developer-tools'
-  _DOCKER_TAG_VERSION_DEVELOPER_TOOLS: '1.20'
+  _DOCKER_TAG_VERSION_DEVELOPER_TOOLS: '1.21'
 options:
   machineType: 'N1_HIGHCPU_8'
   env:

build/lint.cloudbuild.yaml

@@ -21,4 +21,4 @@ tags:
 - 'lint'
 substitutions:
   _DOCKER_IMAGE_DEVELOPER_TOOLS: 'cft/developer-tools'
-  _DOCKER_TAG_VERSION_DEVELOPER_TOOLS: '1.20'
+  _DOCKER_TAG_VERSION_DEVELOPER_TOOLS: '1.21'