Github CI has NDK 27 installed but not yet 28. It doesn't make a dif…

[gpx1000]

…ference to Vulkan Samples, so downgrading for CI purposes is a good idea.

Description

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Fixes #

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• My code follows the coding style
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Sample Checklist

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• I have tested the sample on at least one compliant Vulkan implementation
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[gpx1000]

Try this one.

[SaschaWillems]

Thanks. Very much appreciated 👍🏻

[SaschaWillems]

Ah, looks like CI is also failing with this. Not sure if it's safe to merge.

[gpx1000]

you're right, the CI was set to use the JDK 15 distribution. Let's see if this does it.