[doc] Add authentication to GitHub Container Registry to the Prerequisites section in QuickStart Page

[tatsuya0429]

What this PR does / why we need it:
Add authentication to GitHub Container Registry to the Prerequisites section in QuickStart Page.

I followed the procedure in QuickStart according to the document, but without GitHub Container Registry authentication, I got the following error, so I added it to the Prerequisites section.

Installing the controlplane in quickstart mode...
Failed to install PipeCD control plane!!
github.com/pipe-cd/pipecd/pkg/app/pipectl/cmd/quickstart.(*command).run
        /home/runner/work/pipecd/pipecd/pkg/app/pipectl/cmd/quickstart/quickstart.go:114
github.com/pipe-cd/pipecd/pkg/cli.runWithContext
        /home/runner/work/pipecd/pipecd/pkg/cli/cmd.go:95
github.com/pipe-cd/pipecd/pkg/cli.WithContext.func1
        /home/runner/work/pipecd/pipecd/pkg/cli/cmd.go:51
github.com/spf13/cobra.(*Command).execute
        /home/runner/go/pkg/mod/github.com/spf13/[email protected]/command.go:842
github.com/spf13/cobra.(*Command).ExecuteC
        /home/runner/go/pkg/mod/github.com/spf13/[email protected]/command.go:950
github.com/spf13/cobra.(*Command).Execute
        /home/runner/go/pkg/mod/github.com/spf13/[email protected]/command.go:887
github.com/pipe-cd/pipecd/pkg/cli.(*App).Run
        /home/runner/work/pipecd/pipecd/pkg/cli/app.go:69
main.main
        /home/runner/work/pipecd/pipecd/cmd/pipectl/main.go:46
runtime.main
        /opt/hostedtoolcache/go/1.20.5/x64/src/runtime/proc.go:250
2024/02/04 21:55:59 exit status 1: Error: failed to download "oci://ghcr.io/pipe-cd/chart/pipecd" at version "v0.45.4

Which issue(s) this PR fixes: no

Fixes #

Does this PR introduce a user-facing change?: no

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[ffjlabo]

Nice catch 👍 Thank you for the contribution!

Could you signoff your commits with git commit -s 🙏
https://github.com/pipe-cd/pipecd/blob/master/CONTRIBUTING.md#contributor-license-agreement

Also, could you add the same line to the other version's docs?

• docs/content/en/docs-dev/quickstart/_index.md
• docs/content/en/docs-v0.39.x/quickstart/_index.md
• docs/content/en/docs-v0.40.x/quickstart/_index.md
• docs/content/en/docs-v0.41.x/quickstart/_index.md
• docs/content/en/docs-v0.42.x/quickstart/_index.md
• docs/content/en/docs-v0.43.x/quickstart/_index.md
• docs/content/en/docs-v0.44.x/quickstart/_index.md

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (5cca5e7) 31.03% compared to head (af2613b) 31.03%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4773   +/-   ##
=======================================
  Coverage   31.03%   31.03%           
=======================================
  Files         225      225           
  Lines       26353    26353           
=======================================
  Hits         8179     8179           
  Misses      17521    17521           
  Partials      653      653           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[tatsuya0429]

@ffjlabo
Thank you for your comment.
Sorry I forgot the signoff part of commit.
I have completed adding the prerequisite section for the above markdown as well.
Please check my commits.

[ffjlabo]

LGTM 👍

[t-kikuc]

Thank you so much!!