fix(deps): update module github.com/hetznercloud/hcloud-go/v2 to v2.16.0

This MR contains the following updates:

Package	Type	Update	Change
github.com/hetznercloud/hcloud-go/v2	require	minor	v2.14.0 -> v2.16.0

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Release Notes

hetznercloud/hcloud-go (github.com/hetznercloud/hcloud-go/v2)

v2.16.0

Compare Source

Features

• use custom IDOrName type for schemas (#​545) (1d97017)

Bug Fixes

• metadata: trim responses before parsing (#​547) (283363f), closes #​540

v2.15.0

Compare Source

Features

• exp: add mockutil.Server helper (#​543) (fa1069b)
• exp: fail test when mock calls were expected but not received (#​542) (01392cc)

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