Move preferred install method to top spot

[fulldecent]

Summary

Move the preferred installation method (All-In-One) to the top position when reporting bugs.

Likewise for the latest supported PHP version.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[susnux]

makes sense

[szaimen]

Blocking for now. Reason: #38393 (comment)

[szaimen]

LGTM

[welcome]

Thanks for your first pull request and welcome to the community! Feel free to keep them coming! If you are looking for issues to tackle then have a look at this selection: https://github.com/nextcloud/server/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22

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