Use checkout@v4 for Firebase Hosting Preview GitHub Workflow

[yykamei]

Description

When starting a project with firebase init with GitHub Workflow, YAML files were configured with actions/checkout@v3 previously.

Now, actions/checkout@v4 has been released,
the template should also be updated to specify the latest version.

https://github.com/actions/checkout/releases/tag/v4.0.0

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[joehan]

Thanks for the contribution! You need to sign the CLA before we can accept this. Otherwise, this LGTM. We're planning to run a major release soon to update the support Node versions from 16/18 to 18/20, so we'll include this in the release as well.

[yykamei]

Thank you. I've signed the CLA.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (cf9379f) 54.53% compared to head (afba6a0) 54.54%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6441   +/-   ##
=======================================
  Coverage   54.53%   54.54%           
=======================================
  Files         347      347           
  Lines       23863    23863           
  Branches     4925     4925           
=======================================
+ Hits        13013    13015    +2     
+ Misses       9653     9652    -1     
+ Partials     1197     1196    -1     

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[joehan]

LGTM