Update GitHub Actions file

.github/workflows/test.yml

@@ -4,7 +4,6 @@ on: [push, pull_request]
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -26,13 +25,19 @@ jobs:
         target_device:
           - esp32dev
     steps:
-      - uses: actions/checkout@v1
-      - name: Set up Python
-        uses: actions/setup-python@v1
+      - uses: actions/checkout@v3
+      - uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cache/pip
+            ~/.platformio/.cache
+          key: ${{ runner.os }}-pio
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.11"
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
-          pip install platformio
+          pip install --upgrade platformio
       - name: Run PlatformIO
         run: ci/run-ci.sh
         env: