Upgrade checkout action to avoid deprecation

* `Node.js 12 actions are deprecated. For more information see: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/. Please update the following actions to use Node.js 16: actions/checkout, actions/cache, actions/upload-artifact, actions/cache, actions/checkout`

Signed-off-by: Douglas Camata <159076+douglascamata@users.noreply.github.com>

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
     name: Build
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Cache west modules
         uses: actions/cache@v3
         env: