Upgrade checkout action version

[mfitz]

• Fixes Upgrade the version of the checkout action in use #34

Before fix

A mixture of different versions of the checkout action were in use, with the majority of workflows using the deprecated v3:

√ actions-city-modelling-lab % cd .github/workflow
√ workflows % grep checkout *.yml

aws-upload.yml:    - uses: actions/checkout@v3
conda-build.yml:      - uses: actions/checkout@v3
conda-build.yml:    - uses: actions/checkout@v3
conda-upload.yml:    - uses: actions/checkout@v3
docs-deploy.yml:    - uses: actions/checkout@v4
docs-deploy.yml:    - uses: actions/checkout@v4
pip-build.yml:    - uses: actions/checkout@v3
template-check.yml:      - uses: actions/checkout@v3
validate-reusable-workflows.yml:        uses: actions/checkout@v3

Fix methodology

Global find and replace:

√ workflows % sed -i '.bak' 's/checkout@v3/checkout@v4/g' *

Because I wanted sed to backup the original files in <filename>.bak copies, I created a .gitignore to keep those backup files away from Git.

After fix

All workflows are now using checkout@v4:

√ workflows % grep checkout *.yml

aws-upload.yml:    - uses: actions/checkout@v4
conda-build.yml:      - uses: actions/checkout@v4
conda-build.yml:    - uses: actions/checkout@v4
conda-upload.yml:    - uses: actions/checkout@v4
docs-deploy.yml:    - uses: actions/checkout@v4
docs-deploy.yml:    - uses: actions/checkout@v4
pip-build.yml:    - uses: actions/checkout@v4
template-check.yml:      - uses: actions/checkout@v4
validate-reusable-workflows.yml:        uses: actions/checkout@v4

[brynpickering]

Looks good - should check if there is a dependabot equivalent for CI action versions!

[mfitz]

Looks good - should check if there is a dependabot equivalent for CI action versions!

Turns out that such a thing exists @brynpickering!

https://docs.github.com/en/code-security/dependabot/working-with-dependabot/keeping-your-actions-up-to-date-with-dependabot