Bump actions/setup-node from v2.1.4 to v2.1.5 (#237)

Bumps [actions/setup-node](https://github.com/actions/setup-node) from v2.1.4 to v2.1.5.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](https://github.com/actions/setup-node/compare/v2.1.4...46071b5c7a2e0c34e49c3cb8a0e792e86e18d5ea)

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

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

.github/workflows/autoprefixer.yml

@@ -11,7 +11,7 @@ jobs:
         uses: actions/checkout@v2.3.4
 
       - name: Setup Node
-        uses: actions/setup-node@v2.1.4
+        uses: actions/setup-node@v2.1.5
         with:
           node-version: "15.x"