CI: upgrade to Node 20

Author: manuelbl

.github/workflows/arduino-builds.yaml

@@ -20,11 +20,11 @@ jobs:
           - board: STMicroelectronics:stm32:GenF1
             board_options: pnum=BLACKPILL_F103C8
           - board: STMicroelectronics:stm32:GenF4
-            board_options: pnum=pnum=BLACKPILL_F401CC
+            board_options: pnum=BLACKPILL_F401CC
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install arduino-cli
         run: curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | BINDIR=/usr/local/bin sh
       - name: Install STM32 core

.github/workflows/pio-builds.yaml

@@ -7,16 +7,16 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.cache/pip
             ~/.platformio/.cache
           key: ${{ runner.os }}-pio
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
-          python-version: '3.9'
+          python-version: '3.12'
       - name: Install PlatformIO Core
         run: pip install --upgrade platformio