Bump dessant/lock-threads from 2 to 2.0.3 (#667)

Bumps [dessant/lock-threads](https://github.com/dessant/lock-threads) from 2 to 2.0.3.
- [Release notes](https://github.com/dessant/lock-threads/releases)
- [Changelog](https://github.com/dessant/lock-threads/blob/master/CHANGELOG.md)
- [Commits](dessant/lock-threads@v2...v2.0.3)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/lock.yml

@@ -7,7 +7,7 @@ jobs:
   lock:
     runs-on: ubuntu-latest
     steps:
-      - uses: dessant/lock-threads@v2
+      - uses: dessant/lock-threads@v2.0.3
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           issue-lock-inactive-days: 90