Bump @actions/exec from 1.0.3 to 1.0.4 (#87)

Bumps [@actions/exec](https://github.com/actions/toolkit/tree/HEAD/packages/exec) from 1.0.3 to 1.0.4.
- [Release notes](https://github.com/actions/toolkit/releases)
- [Changelog](https://github.com/actions/toolkit/blob/master/packages/exec/RELEASES.md)
- [Commits](https://github.com/actions/toolkit/commits/HEAD/packages/exec)

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

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

package.json

@@ -24,7 +24,7 @@
   "license": "MIT",
   "dependencies": {
     "@actions/core": "^1.2.3",
-    "@actions/exec": "^1.0.3",
+    "@actions/exec": "^1.0.4",
     "@actions/tool-cache": "^1.3.4",
     "download": "^8.0.0",
     "typed-rest-client": "^1.7.3"