chore(deps): update actions/cache action to v4

.github/actions/setup-micropy/action.yml

@@ -56,7 +56,7 @@ runs:
         echo 'POETRY_INSTALLER_MODERN_INSTALLATION=false' >> $GITHUB_ENV
 
     - name: Cache poetry install.
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       id: poetry-install-cache
       with:
         path: ${{ inputs.poetry-home }}/install-poetry.py
@@ -91,13 +91,13 @@ runs:
         echo "cache-dir=$CACHE_DIR" >> $GITHUB_OUTPUT
 
     - name: Cache poetry cache.
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ${{ steps.poetry-config.outputs.cache-dir }}
         key: poetry-cache-${{ inputs.runner || matrix.os || runner.os }}-${{ inputs.python-version }}-${{ inputs.poetry-version }}
 
     - name: Cache virtual env.
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       id: venv-cache
       with:
         path: .venv