chore(deps): update actions/setup-node action to v6 (#2996)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

packages/ember-simple-auth/.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
         with:
           version: 10
       - name: Install Node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 14.x
           cache: pnpm
@@ -44,7 +44,7 @@ jobs:
         uses: pnpm/action-setup@v2
         with:
           version: 10
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: 14.x
           cache: pnpm
@@ -78,7 +78,7 @@ jobs:
         with:
           version: 10
       - name: Install Node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 14.x
           cache: pnpm