[stable/redis-ha] Bump shellcheck in order to fix arm64 deployment

[Skaronator]

What this PR does / why we need it:

Which issue this PR fixes

This fixes the issue that I'm unable to deploy the helm chart on arm64 nodes. This is due to v0.5.0 does not support arm64
https://hub.docker.com/r/koalaman/shellcheck/tags

Special notes for your reviewer:

After bumping just the shellcheck version I got this new error:

In /readonly-config/init.sh line 239:
    "Error: Could not resolve the announce ip for this pod."
    ^-- SC2288 (warning): This is interpreted as a command name ending with '.'. Double check syntax.

For more information:
  https://www.shellcheck.net/wiki/SC2288 -- This is interpreted as a command ...
stream closed EOF for argocd/argocd-redis-ha-configmap-test (check-init)

So I just removed that dot.

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• DCO signed
• Chart Version bumped
• Variables are documented in the README.md
• Title of the PR starts with chart name (e.g. [stable/mychartname])

[Skaronator]

Thanks! ❤️