chore(deps): update alpine docker tag to v3.21

This MR contains the following updates:

Package	Type	Update	Change
alpine	final	minor	3.17 -> 3.21

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This MR has been generated by Renovate Bot.

Hi,

We're posting this message because this merge request meets the following criteria:

• No activity in the past 60 days (since 2024-02-19T05:04:12.919Z)

We'd like to ask you to help us out and determine how we should act on this merge request:

• is it still a WIP?
• is it still relevant?
• is it missing some reviews?
• do you need help or guidance to proceed?

Some community members have been pinged and will have a look at it too.

Thanks for your help! ❤

/cc @funkwhale/steering

added Status::Input wanted label

changed title from chore(deps): update alpine docker tag to v3.19 to chore(deps): update alpine docker tag to v3.20

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• 0fd4fc1e - chore(deps): update alpine docker tag to v3.20

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• 04a6e567 - chore(deps): update alpine docker tag to v3.20

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• 192c4ae6 - chore(deps): update alpine docker tag to v3.20

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changed title from chore(deps): update alpine docker tag to v3.20 to chore(deps): update alpine docker tag to v3.21

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• 2aa0934f - chore(deps): update alpine docker tag to v3.21

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