fix(nd): approach message alignment

[tracernz]

Fixes #[issue_no]

Summary of Changes

Fix alignment of the approach message. It's always 9-chars wide, left-aligned.

Screenshots (if necessary)

References

Additional context

Discord username (if different from GitHub):

Testing instructions

Load up an approach, get into at least cruise phase, and close to the destination, and check that the approach message appears correctly aligned (compare to the lubber line).

How to download the PR for QA

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4. Click on either flybywire-aircraft-a320-neo, flybywire-aircraft-a380-842 (4K) or flybywire-aircraft-a380-842 (8K) download link at the bottom of the page