ci: bump to node lts version

Author: danielroe

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
       - run: corepack enable
       - uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: lts/*
           cache: "pnpm"
       - run: pnpm install
       - run: pnpm test:engines
@@ -31,7 +31,7 @@ jobs:
       - run: corepack enable
       - uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
           cache: "pnpm"
       - run: pnpm install
       - run: pnpm dev:prepare