Bump py-actions/py-dependency-install from 2 to 3 (#264)

Bumps [py-actions/py-dependency-install](https://github.com/py-actions/py-dependency-install) from 2 to 3.
- [Release notes](https://github.com/py-actions/py-dependency-install/releases)
- [Changelog](https://github.com/py-actions/py-dependency-install/blob/master/CHANGELOG.md)
- [Commits](py-actions/py-dependency-install@v2...v3)

---
updated-dependencies:
- dependency-name: py-actions/py-dependency-install
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -32,7 +32,7 @@ jobs:
         restore-keys: |
             pip-lint-
     - name: Install dependencies
-      uses: py-actions/py-dependency-install@v2
+      uses: py-actions/py-dependency-install@v3
       with:
         path: requirements/flake.txt
     - name: Install itself
@@ -101,7 +101,7 @@ jobs:
         restore-keys: |
             pip-ci-${{ runner.os }}-${{ matrix.pyver }}-
     - name: Install dependencies
-      uses: py-actions/py-dependency-install@v2
+      uses: py-actions/py-dependency-install@v3
       with:
         path: requirements/dev.txt
     - name: Run unittests