Bump actions/upload-artifact from 5 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v7)

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

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

Author: dependabot[bot]

.github/workflows/preview-env.yml

@@ -297,7 +297,7 @@ jobs:
 
       - name: Upload unit test results
         if: always()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v7
         with:
           name: unit-test-results
           path: gateway-api/test-artefacts/unit-tests*
@@ -326,7 +326,7 @@ jobs:
 
       - name: Upload contract test results
         if: always()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v7
         with:
           name: contract-test-results
           path: gateway-api/test-artefacts/contract-tests*
@@ -355,7 +355,7 @@ jobs:
 
       - name: Upload schema test results
         if: always()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v7
         with:
           name: schema-test-results
           path: gateway-api/test-artefacts/schema-tests*
@@ -387,7 +387,7 @@ jobs:
 
       - name: Upload integration test results
         if: always()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v7
         with:
           name: integration-test-results
           path: gateway-api/test-artefacts/integration-tests*
@@ -416,7 +416,7 @@ jobs:
 
       - name: Upload acceptance test results
         if: always()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v7
         with:
           name: acceptance-test-results
           path: gateway-api/test-artefacts/acceptance-tests*

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

@@ -49,7 +49,7 @@ jobs:
         run: make test-unit
       - name: "Upload unit test results"
         if: always()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v7
         with:
           name: unit-test-results
           path: gateway-api/test-artefacts/
@@ -79,7 +79,7 @@ jobs:
         run: make test-contract
       - name: "Upload contract test results"
         if: always()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v7
         with:
           name: contract-test-results
           path: gateway-api/test-artefacts/
@@ -109,7 +109,7 @@ jobs:
         run: make test-schema
       - name: "Upload schema test results"
         if: always()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v7
         with:
           name: schema-test-results
           path: gateway-api/test-artefacts/
@@ -139,7 +139,7 @@ jobs:
         run: make test-integration
       - name: "Upload integration test results"
         if: always()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v7
         with:
           name: integration-test-results
           path: gateway-api/test-artefacts/
@@ -170,7 +170,7 @@ jobs:
         run: make test-acceptance
       - name: "Upload acceptance test results"
         if: always()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v7
         with:
           name: acceptance-test-results
           path: gateway-api/test-artefacts/
@@ -206,7 +206,7 @@ jobs:
           mv coverage-merged.xml ${{ needs.create-coverage-name.outputs.coverage-name }}.xml
       - name: "Upload combined coverage report"
         if: always()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v7
         with:
           name: ${{ needs.create-coverage-name.outputs.coverage-name }}
           path: gateway-api/test-artefacts