Bump actions/upload-artifact from 4 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...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/ci.yml

@@ -82,7 +82,7 @@ jobs:
 
       - name: Upload test results on failure
         if: failure()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: PiNativeTests.xcresult
           path: build/test-results/PiNativeTests.xcresult

.github/workflows/release.yml

@@ -125,7 +125,7 @@ jobs:
 
       - name: Upload notarization diagnostics
         if: failure()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: notarization-diagnostics-${{ github.run_id }}
           path: |
@@ -135,7 +135,7 @@ jobs:
           retention-days: 30
 
       - name: Upload verified release artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: PiNative-${{ steps.release.outputs.version }}
           path: |

.github/workflows/ui-tests.yml

@@ -51,7 +51,7 @@ jobs:
 
       - name: Upload UI test results
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: PiNativeUITests-${{ github.run_id }}
           path: |