Bump alpine images to v3.20

[fra98]

Description

This pr bumps alpine images to v3.20

[adamjensenbot]

Hi @fra98. Thanks for your PR!

I am @adamjensenbot. You can interact with me issuing a slash command in the first line of a comment. Currently, I understand the following commands:

• /rebase: Rebase this PR onto the master branch (You can add the option test=true to launch the tests when the rebase operation is completed)
• /merge: Merge this PR into the master branch
• /build Build Liqo components
• /test Launch the E2E and Unit tests
• /hold, /unhold Add/remove the hold label to prevent merging with /merge

Make sure this PR appears in the liqo changelog, adding one of the following labels:

• kind/breaking: :boom: Breaking Change
• kind/feature: :rocket: New Feature
• kind/bug: :bug: Bug Fix
• kind/cleanup: :broom: Code Refactoring
• kind/docs: :memo: Documentation

[fra98]

/rebase test=true

[fra98]

/test

[fra98]

/test

[fra98]

/test

[fra98]

/test

[fra98]

/merge