update version of cache GH Action

Author: vreuter

.github/workflows/format.yaml

@@ -18,7 +18,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - uses: Gr1N/setup-poetry@v8
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ~/.cache/pypoetry/virtualenvs
           key: ${{ runner.os }}-poetry-format-${{ hashFiles('poetry.lock') }}

.github/workflows/lint.yaml

@@ -18,7 +18,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - uses: Gr1N/setup-poetry@v8
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ~/.cache/pypoetry/virtualenvs
           key: ${{ runner.os }}-poetry-lint-${{ hashFiles('poetry.lock') }}

.github/workflows/tests.yaml

@@ -18,7 +18,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - uses: Gr1N/setup-poetry@v8
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.cache/pypoetry/virtualenvs