Fix test Docker image workflow

Fixed dry run not working and Docker registry.

Author: jpraynaud

.github/workflows/test-docker.yml

@@ -29,7 +29,8 @@ jobs:
         project: [ mithril-aggregator, mithril-client, mithril-signer ]
 
     permissions:
-      contents: read 
+      contents: read
+      packages: write 
 
     env:
       REGISTRY: ghcr.io
@@ -53,7 +54,7 @@ jobs:
           path: ${{ matrix.project }}
           commit: ${{ inputs.commit_sha }}
           workflow: ci.yml
-          workflow_conclusion: success
+          workflow_conclusion: completed
 
       - name: Log in to the Container registry
         uses: docker/login-action@v2
@@ -77,5 +78,5 @@ jobs:
           context: ${{ env.CONTEXT }}
           file: ${{ env.DOCKER_FILE }}
           build-args: CARDANO_BIN_URL=${{ inputs.cardano_bin_url }}
-          push: ${{ inputs.dry_run == 'false' }}
+          push: ${{ inputs.dry_run == false }}
           tags: ${{ steps.meta.outputs.tags }}