chore(ci): Fix container digest uploads.

Signed-off-by: spbsoluble <1661003+spbsoluble@users.noreply.github.com>

Author: spbsoluble

.github/workflows/container.yml

@@ -19,7 +19,6 @@ jobs:
         platform:
           - linux/386
           - linux/amd64
-          - linux/arm/v6
           - linux/arm/v7
           - linux/arm64/v8
           - linux/ppc64le
@@ -95,7 +94,7 @@ jobs:
       - name: Upload digest
         uses: actions/upload-artifact@v5
         with:
-          name: digests
+          name: digests-${{ matrix.platform }}
           path: /tmp/digests/*
           if-no-files-found: error
           retention-days: 1
@@ -115,8 +114,8 @@ jobs:
       - name: Download digests
         uses: actions/download-artifact@v6
         with:
-          name: digests
           path: /tmp/digests
+          merge-multiple: true
 
       # Set up BuildKit Docker container builder to be able to build
       # multi-platform images and export cache