Bump actions/download-artifact from 4 to 5

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4 to 5.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4...v5)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/cicd-2-publish.yaml

@@ -82,7 +82,7 @@ jobs:
           path: dist/lambda.zip
 
       - name: "Download Built Lambdas"
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           name: lambda
           path: ./build

.github/workflows/cicd-3-deploy.yaml

@@ -111,7 +111,7 @@ jobs:
           path: dist/lambda.zip
 
       - name: "Download Built Lambdas"
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           name: lambda
           path: ./build

.github/workflows/manual-terraform-apply.yaml

@@ -45,7 +45,7 @@ jobs:
           path: dist/lambda.zip
 
       - name: "Download Built Lambdas"
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           name: lambda
           path: ./build

.github/workflows/stage-2-test.yaml

@@ -83,7 +83,7 @@ jobs:
         with:
           fetch-depth: 0 # Full history is needed to improving relevancy of reporting
       - name: "Get the coverage report"
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           name: coverage.xml
       - name: "Perform static analysis"

.github/workflows/stage-4-acceptance.yaml

@@ -120,7 +120,7 @@ jobs:
         with:
           python-version: '3.13'
       - name: "Get lambda artefact"
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           name: lambda
           path: dist
@@ -138,7 +138,7 @@ jobs:
           path: integration-test-results.xml
       - name: Gather Integration Test Summaries
         if: always()
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           path: summary
           pattern: ci-summary-*