Fix compilation warnings on shaders from VFX graphs

[ChudeRonczki]

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Purpose of this PR

Why is this PR needed, what hard problem is it solving/fixing?

Due to formatting issue, any compilation of a VFX Graph, when using URP, causes a spam of irritating warnings.

Testing status

Describe what manual/automated tests were performed for this PR

Recompiled a few VFX Graphs with this version, resulting in a correct behavior and no warnings.

Comments to reviewers

Notes for the reviewers you have assigned.

This isn't an invasive change in any capacity, but it should be a big QOL improvement. It can easily also be made on your side, bypassing this PR. Also, I failed to find clear instructions how to fill some points on the checklist above.