deps: bump @actions/tool-cache from 1.5.5 to 1.6.0 (#383)

Bumps [@actions/tool-cache](https://github.com/actions/toolkit/tree/HEAD/packages/tool-cache) from 1.5.5 to 1.6.0.
- [Release notes](https://github.com/actions/toolkit/releases)
- [Changelog](https://github.com/actions/toolkit/blob/master/packages/tool-cache/RELEASES.md)
- [Commits](https://github.com/actions/toolkit/commits/HEAD/packages/tool-cache)

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

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

package.json

@@ -57,7 +57,7 @@
     "@actions/core": "^1.2.4",
     "@actions/exec": "^1.0.4",
     "@actions/io": "^1.0.2",
-    "@actions/tool-cache": "^1.5.5",
+    "@actions/tool-cache": "^1.6.0",
     "node-fetch": "^2.6.0"
   },
   "devDependencies": {