Bump actions/setup-node from v2.1.4 to v2.1.5 (godotengine#261)

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](actions/setup-node@v2.1.4...46071b5)

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

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Install Node.js
-        uses: actions/setup-node@v2.1.4
+        uses: actions/setup-node@v2.1.5
         with:
           node-version: 12.x