ci: use unique artifact names

Author: Crypta-Eve

.github/workflows/main.yml

@@ -43,7 +43,7 @@ jobs:
 
       - name: Get artifact name
         id: getartifactname
-        run: echo "artifact=$(printf '%s-digests' ${{ matrix.image }} | sed 's/\//-/g;s/\./-/g')" >> "$GITHUB_OUTPUT"
+        run: echo "artifact=$(printf '%s-%s-digests' ${{ matrix.image }} ${{ matrix.platform }} | sed 's/\//-/g;s/\./-/g')" >> "$GITHUB_OUTPUT"
 
       # Define tagging policy
       # - everything coming in another branch than default one is considered edge (unstable)
@@ -119,13 +119,17 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
+        platform:
+          - linux/amd64
+          - linux/arm64
+          - linux/arm/v7
         image:
           - eveseat/seat
           - ghcr.io/eveseat/seat
     steps:
       - name: Get artifact name
         id: getartifactname
-        run: echo "artifact=$(printf '%s-digests' ${{ matrix.image }} | sed 's/\//-/g;s/\./-/g')" >> "$GITHUB_OUTPUT"
+        run: echo "artifact=$(printf '%s-%s-digests' ${{ matrix.image }} ${{ matrix.platform }} | sed 's/\//-/g;s/\./-/g')" >> "$GITHUB_OUTPUT"
 
       - name: Download digests
         uses: actions/download-artifact@v3