Merge PR #1037: bump actions/setup-node from 6 to 7

Dependabot github-actions group update. Single-line bump in main.yml,
consistent with the existing actions/checkout@v7.

Co-authored-by: dependabot[bot] <support@github.com>

.github/workflows/main.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v7
       - name: Set up Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@v7
         with:
           node-version: lts/*
       - name: Enable pnpm