chore(deps): bump adfinis/container-scanning-action from 0.2.3 to 0.2.6

Bumps [adfinis/container-scanning-action](https://github.com/adfinis/container-scanning-action) from 0.2.3 to 0.2.6.
- [Release notes](https://github.com/adfinis/container-scanning-action/releases)
- [Commits](adfinis/container-scanning-action@v0.2.3...v0.2.6)

---
updated-dependencies:
- dependency-name: adfinis/container-scanning-action
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/release.yaml

@@ -100,7 +100,7 @@ jobs:
             ${{ steps.meta.outputs.labels }}
 
       - name: Sign backend image and attach SBOM attestation
-        uses: adfinis/[email protected].3
+        uses: adfinis/[email protected].6
         with:
           image-ref: ghcr.io/${{ github.repository }}/backend
           token: ${{ secrets.GITHUB_TOKEN }}
@@ -173,7 +173,7 @@ jobs:
             ${{ steps.meta.outputs.labels }}
 
       - name: Sign image and attach SBOM attestation
-        uses: adfinis/[email protected].3
+        uses: adfinis/[email protected].6
         with:
           image-ref: ghcr.io/${{ github.repository }}/frontend
           token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/schedule.yaml

@@ -24,7 +24,7 @@ jobs:
       # needed for `cosign attest`
       id-token: write
     steps:
-      - uses: adfinis/[email protected].3
+      - uses: adfinis/[email protected].6
         with:
           image-ref: ghcr.io/${{ github.repository }}/backend
           attest: true
@@ -47,7 +47,7 @@ jobs:
       # needed for `cosign attest`
       id-token: write
     steps:
-      - uses: adfinis/[email protected].3
+      - uses: adfinis/[email protected].6
         with:
           image-ref: ghcr.io/${{ github.repository }}/frontend
           attest: true