[github] update workflow actions to use node 20

Author: tgtakaoka

.github/workflows/arduino-ci.yml

@@ -48,7 +48,7 @@ jobs:
               vendor: teensy
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Compile examples
         uses: arduino/compile-sketches@v1
         with:

.github/workflows/ccpp.yml

@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: build test and run
       run: cd test; make test
     - name: build generator

.github/workflows/platformio-ci.yml

@@ -52,21 +52,21 @@ jobs:
           - z8000
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Cache pip
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
           restore-keys: |
             ${{ runner.os }}-pip-
       - name: Cache PlatformIO
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.platformio
           key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
       - name: Install PlatformIO
         run: |
           python -m pip install --upgrade pip