No longer persist credentials

[jakmagaud]

This PR disables persisting credentials in the github workflow.

[github-actions]

👋 Hello. It looks like you've modified some files that we can't accept as contributions. The complete list of files we can't accept are:
.github/**
_plugins/**
analytics/**
js/**
scripts/**
vale-styles/**
_config.yml
gemfile
yarn.lock
.vale.ini
netlify.toml
package.json

Please revert all files in this list and resubmit your pull request.

[github-actions]

👋 Hello. It looks like you've modified some files that we can't accept as contributions. The complete list of files we can't accept are:
.github/**
_plugins/**
analytics/**
js/**
scripts/**
vale-styles/**
_config.yml
gemfile
yarn.lock
.vale.ini
netlify.toml
package.json

Please revert all files in this list and resubmit your pull request.

[github-actions]

👋 Hello. It looks like you've modified some files that we can't accept as contributions. The complete list of files we can't accept are:
.github/**
_plugins/**
analytics/**
js/**
scripts/**
vale-styles/**
_config.yml
gemfile
yarn.lock
.vale.ini
netlify.toml
package.json

Please revert all files in this list and resubmit your pull request.

[github-actions]

👋 Hello. It looks like you've modified some files that we can't accept as contributions. The complete list of files we can't accept are:
.github/**
_plugins/**
analytics/**
js/**
scripts/**
vale-styles/**
_config.yml
gemfile
yarn.lock
.vale.ini
netlify.toml
package.json

Please revert all files in this list and resubmit your pull request.