ci: fix wrong docker metadata version output usage

Author: JGiola

.github/workflows/docker-build.yml

@@ -93,7 +93,7 @@ jobs:
     - name: Scan image
       uses: sysdiglabs/scan-action@f82dfca019814742e751f7e5118cc107b0a14acb # v6.1.3
       with:
-        image-tag: nexus.mia-platform.eu/microlc/middleware:${{ steps.meta.outputs.version.main }}
+        image-tag: nexus.mia-platform.eu/microlc/middleware:${{ steps.meta.outputs.version }}
         sysdig-secure-url: "https://eu1.app.sysdig.com"
         sysdig-secure-token: ${{ secrets.sysdig_token }}
         registry-user: ${{ secrets.nexus_username }}
@@ -105,7 +105,7 @@ jobs:
       with:
         artifact-name: middleware-sbom.spdx.json
         output-file: ./middleware-sbom.spdx.json
-        image: nexus.mia-platform.eu/microlc/middleware:${{ steps.meta.outputs.version.main }}
+        image: nexus.mia-platform.eu/microlc/middleware:${{ steps.meta.outputs.version }}
         upload-release-assets: true
     - name: GCP Auth
       uses: google-github-actions/auth@7c6bc770dae815cd3e89ee6cdf493a5fab2cc093 # v3.0.0
@@ -124,7 +124,7 @@ jobs:
         done
       env:
         TAGS: |
-          docker.io/microlc/middleware:${{ steps.meta.outputs.version.main }}
-          nexus.mia-platform.eu/microlc/middleware:${{ steps.meta.outputs.version.main }}
+          docker.io/microlc/middleware:${{ steps.meta.outputs.version }}
+          nexus.mia-platform.eu/microlc/middleware:${{ steps.meta.outputs.version }}
         DIGEST: ${{ steps.docker-build.outputs.digest }}
         COSIGN_PRIVATE_KEY: ${{ secrets.cosign_key }}