refactor(ci): pin check and test to 24.x node version

Author: pitzzahh

.github/workflows/ci.yml

@@ -20,18 +20,16 @@ jobs:
     name: "Svelte Check"
     runs-on: ubuntu-latest
     strategy:
-      matrix:
-        node-version: [20.x, 22.x, "24.x"]
     steps:
       - uses: actions/checkout@v4
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
           version: latest
-      - name: Use Node.js ${{ matrix.node-version }}
+      - name: Use Node.js 24.x
         uses: actions/setup-node@v4
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: 24.x
           cache: "pnpm"
       - run: pnpm install --frozen-lockfile
       - run: pnpm run check
@@ -40,19 +38,16 @@ jobs:
     name: "Test"
     needs: check
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        node-version: [20.x, 22.x, "24.x"]
     steps:
       - uses: actions/checkout@v4
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
           version: latest
-      - name: Use Node.js ${{ matrix.node-version }}
+      - name: Use Node.js 24.x
         uses: actions/setup-node@v4
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: 24.x
           cache: "pnpm"
       - run: pnpm install --frozen-lockfile
       - run: pnpm run test