Update actions/cache action to v4.2.0 (#95)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
           version-type: strict
 
       - name: Restore the deps and _build cache
-        uses: actions/cache@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4
+        uses: actions/cache@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
         id: restore-cache
         env:
           OTP_VERSION: ${{ steps.beam.outputs.otp-version }}