fix(deps): update module github.com/hetznercloud/hcloud-go/v2 to v2.20.1

This MR contains the following updates:

Package	Type	Update	Change
github.com/hetznercloud/hcloud-go/v2	require	minor	v2.19.1 -> v2.20.1

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Release Notes

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

v2.20.1

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Bug Fixes

• panic when a request did not set the OpPath for instrumentation (#​635)

v2.20.0

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In this release, the api_endpoint metric labels changed for all our API requests. Please make sure to update your setup if you were relying on them. The new labels are now easier to understand, see the example below:

• the path /volumes/64314930 now has the label /volumes/- instead of /volumes/
• the path /volumes/64314930/actions/resize now has the label /volumes/-/actions/resize instead of /volumes/actions/resize

Features

• support go v1.24 (#​604)
• drop go v1.21 (#​604)
• exp: remove sliceutil package (#​610)
• drop go v1.22 (#​602) (#​621)
• redefine api_endpoint metric labels (#​626)

Bug Fixes

• request in batches of 25 when waiting for actions (#​611)
• missing response from requests return values (#​613)
• move primary ip client request/response structs to schema package (#​633)

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