Merge pull request #3 from elliotmatson/dependabot/github_actions/actions/cache-3

Bump actions/cache from 2 to 3

.github/workflows/pio_build.yml

@@ -31,13 +31,13 @@ jobs:
       run: echo $PLATFORMIO_BUILD_FLAGS
     - uses: actions/checkout@v2
     - name: Cache pip
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: ~/.cache/pip
         key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
         restore-keys: ${{ runner.os }}-pip-
     - name: Cache PlatformIO
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: ~/.platformio
         key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}