deps: bump @actions/exec from 1.0.4 to 1.1.0

Bumps [@actions/exec](https://github.com/actions/toolkit/tree/HEAD/packages/exec) from 1.0.4 to 1.1.0.
- [Release notes](https://github.com/actions/toolkit/releases)
- [Changelog](https://github.com/actions/toolkit/blob/main/packages/exec/RELEASES.md)
- [Commits](https://github.com/actions/toolkit/commits/@actions/core@1.1.0/packages/exec)

---
updated-dependencies:
- dependency-name: "@actions/exec"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -48,7 +48,7 @@
  "homepage": "https://github.com/peaceiris/actions-gh-pages#readme",
  "dependencies": {
  "@actions/core": "^1.2.7",
- "@actions/exec": "^1.0.4",
+ "@actions/exec": "^1.1.0",
  "@actions/github": "^4.0.0",
  "@actions/glob": "^0.1.1",
  "@actions/io": "^1.1.0",