Correct the output of helm-publish

Describe the bug

The output of helm-publish should use the pubscript variable in context of the shell function. It uses the postscript variable out of context. Copy error?

Expected behavior

Output the name of the custom publish script.

Actual behavior

Outputs the name of the post processing script.

Logs and/or screenshots

N/A

Context & Configuration

N/A Found in review of the changes.

The issue was reproduced using:

• Version of the template: 4.1.3
• GitLab server(s): GitLab.com
• GitLab runner(s): N/A

Here is the .gitlab-ci.yml file:

# Add your .gitlab-ci.yml here, if applicable and useful.

(If useful, list configured GitLab CI project and/or group variables.)

Configured GitLab CI project or group variables:

N/A

(Finally add any possible additional useful context info here.)

As noted, I found this in review of the code. MR here.