chore(deps): update actions/setup-node action to v6 (#651)

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

Author: renovate[bot]

.github/workflows/plan-release.yml

@@ -52,7 +52,7 @@ jobs:
           fetch-depth: 0
           ref: 'master'
       - uses: pnpm/action-setup@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: 22
           cache: pnpm

.github/workflows/publish.yml

@@ -29,7 +29,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: 22
           # This creates an .npmrc that reads the NODE_AUTH_TOKEN environment variable