ci: Update stefanprodan/helm-gh-pages to step-security maintained version

[rbarkerSL]

Background

Step-security is maintaining a list of actions with low scores. We need to update our third party actions to use
only actions with high scores. Step-security is now maintaining forked versions of utilized actions that should
be used. This story intends to update the actions listed below in Step-Security Actions.

Step-Security Action(s)

Update github actions with step-security maintained version

• Original Action: stefanprodan/helm-gh-pages
• Step Security Maintained Action: step-security/helm-gh-pages (version v1.7.0)

Acceptance Criteria

• All required actions have been updated