chore(deps): update actions/upload-artifact digest to 6f51ac0 (#73)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -75,7 +75,7 @@ jobs:
         uses: taiki-e/install-action@cargo-llvm-cov
       - name: Run tests with coverage
         run: cargo --locked llvm-cov nextest
-      - uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4
+      - uses: actions/upload-artifact@6f51ac03b9356f520e9adb1b1b7802705f340c2b # v4
         if: success() || failure()
         with:
           name: junit.xml