Bump actions/download-artifact from 5 to 6

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/docker.yml

@@ -57,7 +57,7 @@ jobs:
       with:
         ref: dev
     - name: Download version
-      uses: actions/download-artifact@v5
+      uses: actions/download-artifact@v6
       with:
         name: _version.py
     - name: docker_build

.github/workflows/release.yml

@@ -127,7 +127,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Download version
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: _version.py
       - name: Set tag