GHA: Fix deprecation warnings (#1075)

Fixes

```
hierarchical (3.11)
Node.js 12 actions are deprecated. Please update the following actions to use Node.js 16: actions/checkout@v2, actions/setup-python@v1, actions/cache@v1. For more information see: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/.
hierarchical (3.9)
Node.js 12 actions are deprecated. Please update the following actions to use Node.js 16: actions/checkout@v2, actions/setup-python@v1, actions/cache@v1. For more information see: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/.
```

.github/workflows/ci.yml

@@ -166,15 +166,15 @@ jobs:
 
     steps:
     - name: Check out repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Prepare python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
 
     - name: Cache
-      uses: actions/cache@v1
+      uses: actions/cache@v3
       with:
         path: ~/.cache
         key: ${{ runner.os }}-${{ matrix.python-version }}-ci-hierarchical