build: T6330: fix indention of autogenerated release.pref.chroot

[c-po]

Change Summary

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

• https://vyos.dev/T6330

Component(s) name

Proposed changes

How to test

cpo lnx01:~/vyos-build [T6330-release-pref] # cat build/config/archives/release.pref.chroot
Package: *
Pin: release n=current
Pin-Priority: 600

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

[c-po]

@Mergifyio backport sagitta

[mergify]

backport sagitta

✅ Backports have been created

• #613 build: T6330: fix indention of autogenerated release.pref.chroot (backport #612) has been created for branch sagitta