Merge pull request #95 from jpmeijers/dependabot/github_actions/actio…

…ns/cache-4

Bump actions/cache from 3 to 4

.github/workflows/platformio.yml

@@ -38,14 +38,14 @@ jobs:
         with:
           python-version: "3.7"
       - 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') }}