Bump crazy-max/ghaction-docker-buildx from 1 to 3.3.1 (bokysan#74)

Bumps [crazy-max/ghaction-docker-buildx](https://github.com/crazy-max/ghaction-docker-buildx) from 1 to 3.3.1.
- [Release notes](https://github.com/crazy-max/ghaction-docker-buildx/releases)
- [Changelog](https://github.com/crazy-max/ghaction-docker-buildx/blob/master/CHANGELOG.md)
- [Commits](crazy-max/ghaction-docker-buildx@v1...v3.3.1)

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

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

.github/workflows/pull_request.yml

@@ -14,7 +14,7 @@ jobs:
         run: ./unit-tests.sh
       - name: Set up Docker Buildx
         id: buildx
-        uses: crazy-max/ghaction-docker-buildx@v1
+        uses: crazy-max/ghaction-docker-buildx@v3.3.1
         with:
           buildx-version: latest
       - name: Run integration tests