[tools] Remove matrix

Author: ZacharieTFR

.github/workflows/CI.yml

@@ -11,16 +11,12 @@ jobs:
 
     runs-on: ubuntu-latest
 
-    strategy:
-      matrix:
-        node-version: [16.x]
-
     steps:
     - uses: actions/checkout@v3
-    - name: Use Node.js ${{ matrix.node-version }}
+    - name: Use Node.js
       uses: actions/setup-node@v3
       with:
-        node-version: ${{ matrix.node-version }}
+        node-version: '16.x'
         cache: 'npm'
     - run: npm ci
     - name: Lint