ci: run docs linting step on node 18

.github/workflows/docs.yml

@@ -16,19 +16,14 @@ on:
 
 jobs:
   lint-docs:
-    runs-on: ${{ matrix.os }}
-
-    strategy:
-      matrix:
-        os: [ubuntu-latest]
-        node: [14]
+    runs-on: ubuntu-latest
 
     steps:
       - uses: actions/checkout@v3
       - run: corepack enable
       - uses: actions/setup-node@v3
         with:
-          node-version: ${{ matrix.node }}
+          node-version: 18
           cache: "pnpm"
 
       - name: Install dependencies