chore(release): prepare for 1.6.4 (#349)

## [1.6.4] - 2026-04-19

### 🐛 Bug Fixes

- *(deps)* Update module k8s.io/apimachinery to v0.35.4 (#346)
- *(deps)* Update kubernetes monorepo to v0.35.4 (#348)

### ⚙️ Miscellaneous Tasks

- *(deps)* Update golang:1.26.1 docker digest to 5ba1126 (#341)
- *(deps)* Update dependency go to v1.26.2 (#343)
- *(deps)* Update golang docker tag to v1.26.2 (#345)

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---

**Note:** Please use **Squash Merge** when merging this PR.

Reviewed-on: #349
Co-authored-by: Unbound Releaser <releaser@unbound.se>
Co-committed-by: Unbound Releaser <releaser@unbound.se>

.version

@@ -1,3 +1,3 @@
 {
-  "version": "1.6.3"
+  "version": "1.6.4"
 }

CHANGELOG.md

@@ -2,6 +2,19 @@
 
 All notable changes to this project will be documented in this file.
 
+## [1.6.4] - 2026-04-19
+
+### 🐛 Bug Fixes
+
+- *(deps)* Update module k8s.io/apimachinery to v0.35.4 (#346)
+- *(deps)* Update kubernetes monorepo to v0.35.4 (#348)
+
+### ⚙️ Miscellaneous Tasks
+
+- *(deps)* Update golang:1.26.1 docker digest to 5ba1126 (#341)
+- *(deps)* Update dependency go to v1.26.2 (#343)
+- *(deps)* Update golang docker tag to v1.26.2 (#345)
+
 ## [1.6.3] - 2026-03-19
 
 ### 🐛 Bug Fixes