fix(deps): update module goyave.dev/goyave/v5 to v5.5.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
goyave.dev/goyave/v5	v5.5.2 -> v5.5.4

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Release Notes

go-goyave/goyave (goyave.dev/goyave/v5)

v5.5.4

Compare Source

• Retract v5.5.3 as it introduced a bug in the absence detection for the root element (if validation.CurrentElement wasn't required).
• Fixed the bug introduced in v5.5.3

v5.5.3

Compare Source

• In validation, fixed nullable field absence detection. This fixes validators on nullable fields being executed even if the field is not present at all in the request.

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