feat(ci): add cache-dependency-path (#306)

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## Summary

This PR adds the `cache-dependency-path` parameter which allows us to
explicitly specify files which contain packages. More information can be
found on the [docs for
actions/setup-python](https://github.com/actions/setup-python/blob/main/docs/advanced-usage.md#caching-packages)

.github/workflows/ci.yaml

@@ -22,6 +22,10 @@ jobs:
         with:
           python-version: "3.11"
           cache: 'pip'
+          cache-dependency-path: |
+            pyproject.toml
+            requirements.txt
+            requirements-dev.txt
       - name: Install dependencies
         run: just install
       - name: Run checks
@@ -86,6 +90,10 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
           cache: 'pip'
+          cache-dependency-path: |
+            pyproject.toml
+            requirements.txt
+            requirements-dev.txt
 
       - name: Install dependencies
         run: |