Attempting to fix main-docker.yml for downloading digests (#243)

* Update main-docker.yml (digests)

Updated digest name on upload (as per 1187084)

* Update main-docker.yml (digests download)

Trying another fix based on the template provided here https://github.com/actions/download-artifact for downloading multiple (filtered) Artifacts to the same directory

.github/workflows/main-docker.yml

@@ -78,8 +78,10 @@ jobs:
         name: Download digests
         uses: actions/download-artifact@v4.1.7
         with:
-          name: digests-${{ matrix.target }}
           path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+
       -
         name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3