build(deps): bump actions/cache from 3 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3...v4)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/pylic.yml

@@ -28,7 +28,7 @@ jobs:
       #  -----  install & configure poetry  -----
       #----------------------------------------------
       - name: Load Cached Poetry Installation
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.local # the path depends on the OS
           key: poetry-no-dev-3 # increment to reset cache
@@ -43,7 +43,7 @@ jobs:
       #----------------------------------------------
       - name: Load cached venv
         id: cached-poetry-no-dev-dependencies-v1
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: .venv
           key: venv-no-dev-dependencies-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-${{ hashFiles('**/poetry.lock') }}

.github/workflows/static-checking.yml

@@ -28,7 +28,7 @@ jobs:
       #  -----  install & configure poetry  -----
       #----------------------------------------------
       - name: Load Cached Poetry Installation
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.local # the path depends on the OS
           key: poetry-with-dev-0 # increment to reset cache
@@ -44,7 +44,7 @@ jobs:
       #----------------------------------------------
       - name: Load cached venv
         id: cached-poetry-with-dev-dependencies
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: .venv
           key: venv-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-${{ hashFiles('**/poetry.lock') }}