Merge pull request #48 from open-contracting-extensions/dependabot/gi…

…thub_actions/actions/cache-4

Bump actions/cache from 3 to 4

.github/workflows/lint.yml

@@ -11,7 +11,7 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: '3.10'
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip