ci: use last lts version rather than hard-code it

Author: danielroe

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
       - run: corepack enable
       - uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: lts/-1
           cache: pnpm
 
       - name: 📦 Install dependencies
@@ -35,7 +35,7 @@ jobs:
       - run: corepack enable
       - uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: lts/-1
           cache: pnpm
 
       - name: 📦 Install dependencies