Bump actions/download-artifact from 6 to 7

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build-and-push-image.yml

@@ -107,7 +107,7 @@ jobs:
         aws-role: ${{ fromJSON(needs.define-matrix.outputs.aws-roles) }}
     steps:
       - name: Download Docker image
-        uses: actions/download-artifact@v6
+        uses: actions/download-artifact@v7
         with:
           name: image
       - name: Configure AWS Credentials

.github/workflows/deploy-application.yml

@@ -134,7 +134,7 @@ jobs:
           role-to-assume: ${{ env.aws_role }}
           aws-region: eu-west-2
       - name: Download reporting task definition artifact
-        uses: actions/download-artifact@v6
+        uses: actions/download-artifact@v7
         with:
           path: ${{ runner.temp }}
           name: ${{ inputs.environment }}-reporting-task-definition