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] <support@github.com>

Author: dependabot[bot]

.github/workflows/publish-go-tester-task.yml

@@ -146,7 +146,7 @@ jobs:
 
     steps:
       - name: Download build artifacts
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
 
       - name: Create checksum file
         run: |

.github/workflows/release-go-task.yml

@@ -86,7 +86,7 @@ jobs:
 
     steps:
       - name: Download artifact
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           pattern: ${{ env.ARTIFACT_PREFIX }}*
           merge-multiple: true

.github/workflows/sync-labels.yml

@@ -114,7 +114,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Download configuration file artifacts
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           merge-multiple: true
           pattern: ${{ env.CONFIGURATIONS_ARTIFACT_PREFIX }}*