Bump aquasecurity/trivy-action from 0.27.0 to 0.28.0 in the minor group

Bumps the minor group with 1 update: [aquasecurity/trivy-action](https://github.com/aquasecurity/trivy-action).


Updates `aquasecurity/trivy-action` from 0.27.0 to 0.28.0
- [Release notes](https://github.com/aquasecurity/trivy-action/releases)
- [Commits](aquasecurity/trivy-action@5681af8...915b19b)

---
updated-dependencies:
- dependency-name: aquasecurity/trivy-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor
...

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

.github/workflows/security.yml

@@ -38,7 +38,7 @@ jobs:
           echo >> projects/${{ matrix.project }}/.trivyignore
 
       - name: Scan image
-        uses: aquasecurity/trivy-action@5681af892cd0f4997658e2bacc62bd0a894cf564 # v0.27.0
+        uses: aquasecurity/trivy-action@915b19bbe73b92a6cf82a1bc12b087c9a19a5fe2 # v0.28.0
         with:
           image-ref: 'ghcr.io/ministryofjustice/hmpps-probation-integration-services/${{ matrix.project }}:latest'
           ignore-unfixed: true
@@ -56,7 +56,7 @@ jobs:
           sarif_file: 'trivy-results.sarif'
 
       - name: Get Trivy results
-        uses: aquasecurity/trivy-action@5681af892cd0f4997658e2bacc62bd0a894cf564 # v0.27.0
+        uses: aquasecurity/trivy-action@915b19bbe73b92a6cf82a1bc12b087c9a19a5fe2 # v0.28.0
         with:
           image-ref: 'ghcr.io/ministryofjustice/hmpps-probation-integration-services/${{ matrix.project }}:latest'
           ignore-unfixed: true