ci: update test cache action

Author: banteg

.github/workflows/test.yaml

@@ -80,7 +80,7 @@ jobs:
           uses: ApeWorX/geth-action@v1
 
         - name: Cache Ape Packages
-          uses: actions/cache@v4
+          uses: actions/cache@v5
           with:
             path: ~/.ape/packages
             key: ${{ runner.os }}-ape-packages-${{ hashFiles('pyproject.toml') }}