Update docker/metadata-action action to v3.8.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
docker/metadata-action	action	minor	v3.7.0 -> v3.8.0

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Release Notes

docker/metadata-action

v3.8.0

Compare Source

• Add attribute to enable/disable images by @​crazy-max (#​193)
• Add is_default_branch global expression by @​crazy-max (#​192 #​197 #​198)
• Update fixtures (dev) by @​crazy-max (#​190)
• Bump semver from 7.3.5 to 7.3.7 (#​185)
• Bump moment from 2.29.2 to 2.29.3 (#​187)
• Bump csv-parse from 4.16.3 to 5.0.4 (#​195)

Full Changelog: docker/metadata-action@v3.7.0...v3.8.0

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