deps: update actions/upload-artifact action to v6 (#1110)

Author: renovate[bot]

.github/workflows/test.yml

@@ -148,7 +148,7 @@ jobs:
       - name: Persist debug artifacts
         if: always()
         continue-on-error: true
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: debug-logs-${{ env.ENV }}
           path: debug-logs/
@@ -271,7 +271,7 @@ jobs:
       - name: Persist debug artifacts
         if: always()
         continue-on-error: true
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: debug-logs-${{ env.ENV }}
           path: debug-logs/