Update actions/upload-artifact action to v6

Author: renovate[bot]

.github/workflows/ci.yml

@@ -51,7 +51,7 @@ jobs:
           INSTA_UPDATE: new
 
       - if: ${{ failure() && steps.run_tests.outcome == 'failure' }}
-        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: failed-snapshots
           path: "**/snapshots/*.snap.new"