fix(deps): update module golang.org/x/sync to v0.12.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
golang.org/x/sync	v0.11.0 -> v0.12.0

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[renovate]

ℹ Artifact update notice

File name: go.mod

In order to perform the update(s) described in the table above, Renovate ran the go get command, which resulted in the following additional change(s):

• The go directive was updated for compatibility reasons

Details:

Package	Change
go	1.23 -> 1.24.1

[brianmcgee]

I need to add something which will automatically update the vendor hash.
@Mic92 you have something for this don't you?

[Mic92]

https://github.com/Mic92/ssh-to-age/blob/main/.github/workflows/update-vendor-hash.yml