Update actions/cache action to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/cache	action	major	v3.3.3 -> v4.0.0

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Release Notes

actions/cache (actions/cache)

v4.0.0

Compare Source

What's Changed

• Update action to node20 by @​takost in https://github.com/actions/cache/pull/1284
• feat: save-always flag by @​to-s in https://github.com/actions/cache/pull/1242

New Contributors

• @​takost made their first contribution in https://github.com/actions/cache/pull/1284
• @​to-s made their first contribution in https://github.com/actions/cache/pull/1242

Full Changelog: actions/cache@v3...v4.0.0

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