build(trident): sanitize image name when exporting

Signed-off-by: Clément Nussbaumer <[email protected]>

.github/workflows/trident.yaml

@@ -2,11 +2,11 @@ name: Trident Build
 
 on:
   push:
-    paths:
-      - "trident-distrowith/**"
+    # paths:
+    #   - "trident-distrowith/**"
   pull_request:
-    paths:
-      - "trident-distrowith/**"
+    # paths:
+    #   - "trident-distrowith/**"
 
 jobs:
   build:
@@ -54,7 +54,7 @@ jobs:
           mkdir -p /tmp/docker-images/
           docker image ls --format=json | \
            jq -s '[.[] | select(.Repository | test("ghcr.io/postfinance/trident.*"))] | unique_by(.ID) |.[] | .Repository + ":" + .Tag' | \
-           xargs -I_ docker save _ -o /tmp/docker-images/_.tar
+           xargs -I_ sh -c 'docker save _ -o /tmp/docker-images/$(echo _ | sed "s|[/:\.]|-|g").tar'
 
       - name: Upload docker images artifacts
         uses: actions/upload-artifact@v4