Run sed with -i option in artifacts job

.github/workflows/audit.yml

@@ -25,6 +25,6 @@ jobs:
  run: cargo install cargo-outdated
  - uses: actions/checkout@master
  - name: Delete `web-sys` dependency from `integration` example
- run: sed '$d' examples/integration/Cargo.toml
+ run: sed -i '$d' examples/integration/Cargo.toml
  - name: Find outdated dependencies
  run: cargo outdated --workspace --exit-code 1