workflows: bump actions/checkout from 2 to 3

[dependabot]

Bumps actions/checkout from 2 to 3.

Release notes

Sourced from actions/checkout's releases.

v3.0.0

• Update default runtime to node16

v2.4.0

• Convert SSH URLs like org-<ORG_ID>@github.com: to https://github.com/ - pr

v2.3.5

Update dependencies

v2.3.4

• Add missing awaits
• Swap to Environment Files

v2.3.3

• Remove Unneeded commit information from build logs
• Add Licensed to verify third party dependencies

v2.3.2

Add Third Party License Information to Dist Files

v2.3.1

Fix default branch resolution for .wiki and when using SSH

v2.3.0

Fallback to the default branch

v2.2.0

Fetch all history for all tags and branches when fetch-depth=0

v2.1.1

Changes to support GHES (here and here)

v2.1.0

• Group output
• Changes to support GHES alpha release
• Persist core.sshCommand for submodules
• Add support ssh
• Convert submodule SSH URL to HTTPS, when not using SSH
• Add submodule support
• Follow proxy settings
• Fix ref for pr closed event when a pr is merged
• Fix issue checking detached when git less than 2.22

Changelog

Sourced from actions/checkout's changelog.

Changelog

v2.3.1

• Fix default branch resolution for .wiki and when using SSH

v2.3.0

• Fallback to the default branch

v2.2.0

• Fetch all history for all tags and branches when fetch-depth=0

v2.1.1

• Changes to support GHES (here and here)

v2.1.0

• Group output
• Changes to support GHES alpha release
• Persist core.sshCommand for submodules
• Add support ssh
• Convert submodule SSH URL to HTTPS, when not using SSH
• Add submodule support
• Follow proxy settings
• Fix ref for pr closed event when a pr is merged
• Fix issue checking detached when git less than 2.22

v2.0.0

• Do not pass cred on command line
• Add input persist-credentials
• Fallback to REST API to download repo

Commits

• a12a394 update readme for v3 (#708)
• 8f9e05e Update to node 16 (#689)
• 230611d Change secret name for PAT to not start with GITHUB_ (#623)
• See full diff in compare view

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[dependabot]

Looks like actions/checkout is up-to-date now, so this is no longer needed.