deps: update dependency go to v1.25.6 (#1127)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [go](https://go.dev/)
([source](https://redirect.github.com/golang/go)) | | patch | `1.25.5` →
`1.25.6` |
| [go](https://go.dev/)
([source](https://redirect.github.com/golang/go)) | toolchain | patch |
`1.25.5` → `1.25.6` |

---

### Release Notes

<details>
<summary>golang/go (go)</summary>

###
[`v1.25.6`](https://redirect.github.com/golang/go/compare/go1.25.5...go1.25.6)

</details>

---

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---

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---

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.pre-commit-config.yaml

@@ -85,7 +85,7 @@ repos:
     rev: v2.8.0
     hooks:
       - id: golangci-lint-full
-        language_version: 1.25.5 # renovate: datasource=golang-version depName=go
+        language_version: 1.25.6 # renovate: datasource=golang-version depName=go
 
   - repo: local
     hooks:

go.mod

@@ -2,7 +2,7 @@ module github.com/hetznercloud/hcloud-cloud-controller-manager
 
 go 1.25.0
 
-toolchain go1.25.5
+toolchain go1.25.6
 
 require (
 	github.com/hetznercloud/hcloud-go/v2 v2.32.0