fix: Use builder from version stream in release

So that we don't need to update this in the future to pick up fixes
like #5691.

Signed-off-by: Andrew Bayer <andrew.bayer@gmail.com>

jenkins-x.yml

@@ -82,7 +82,7 @@ pipelineConfig:
               - name: release
                 #image: docker.io/golang:1.11.5
                 # needs helm in the image for install_gitops_integration_test.go
-                image: gcr.io/jenkinsxio/builder-go:0.1.639
+                image: gcr.io/jenkinsxio/builder-go
                 command: make
                 args: ['release']
 
@@ -93,15 +93,15 @@ pipelineConfig:
                 args: ['--dockerfile=/workspace/source/Dockerfile','--destination=gcr.io/jenkinsxio/jx:${inputs.params.version}','--destination=gcr.io/jenkinsxio/jx:latest','--context=/workspace/source','--cache-dir=/workspace']
 
               - name: release-charts
-                image: gcr.io/jenkinsxio/builder-go:0.1.639
+                image: gcr.io/jenkinsxio/builder-go
                 command: make
                 args:
                 - "release"
                 - -f
                 - /workspace/source/charts/jx/Makefile
 
               - name: update-bot
-                image: gcr.io/jenkinsxio/builder-go:0.1.734
+                image: gcr.io/jenkinsxio/builder-go
                 command: ./jx/scripts/update-bot.sh
 
               #- name: distro