chore(deps): bump googleapis/release-please-action from 4 to 5

Bumps [googleapis/release-please-action](https://github.com/googleapis/release-please-action) from 4 to 5.
- [Release notes](https://github.com/googleapis/release-please-action/releases)
- [Changelog](https://github.com/googleapis/release-please-action/blob/main/CHANGELOG.md)
- [Commits](https://github.com/googleapis/release-please-action/compare/v4...v5)

---
updated-dependencies:
- dependency-name: googleapis/release-please-action
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/release-please.yml

@@ -20,7 +20,7 @@ jobs:
       minor: ${{ steps.release.outputs.minor }}
       patch: ${{ steps.release.outputs.patch }}
     steps:
-      - uses: googleapis/release-please-action@v4
+      - uses: googleapis/release-please-action@v5
         id: release
         with:
           token: ${{ secrets.ZMK_RELEASE_PLEASE_TOKEN }}

app/boards/seeed/xiao_rp2040/Kconfig.xiao_rp2040

@@ -0,0 +1,10 @@
+# Copyright (c) 2026 Pete Johanson
+# SPDX-License-Identifier: MIT
+
+config BOARD_XIAO_RP2040
+    select ZMK_BOARD_COMPAT if BOARD_XIAO_RP2040_RP2040_ZMK
+    imply RETAINED_MEM if BOARD_XIAO_RP2040_RP2040_ZMK
+    imply RETENTION if BOARD_XIAO_RP2040_RP2040_ZMK
+    imply RETENTION_BOOT_MODE if BOARD_XIAO_RP2040_RP2040_ZMK
+
+