fix: deprecation warning on go to definition hover action (nvim 0.11)

[frolvanya]

I assume that this issue was silent, because we used jump_to_location method instead. Since now this method is deprecated we can see that show_document is never called. The correct location of show_document method is in util

closes #710

[github-actions]

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[mrcjkb]

Thanks 🙏

Strange that I wasn't getting any deprecation warnings in nightly 🤔