chore(deps): update actions/cache action to v4.1.2

.github/workflows/ci.yaml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/[email protected]
-      - uses: actions/[email protected].0
+      - uses: actions/[email protected].2
         with:
           key: ${{ github.job }}-${{ hashFiles('mix.lock') }}-1
           path: _build
@@ -56,7 +56,7 @@ jobs:
     runs-on: ${{ matrix.os || 'ubuntu-20.04' }}
     steps:
       - uses: actions/[email protected]
-      - uses: actions/[email protected].0
+      - uses: actions/[email protected].2
         with:
           key: ${{ github.job }}-${{ matrix.elixir }}-${{ matrix.otp }}-${{ hashFiles('mix.lock') }}-1
           path: _build