Bump actions/setup-python from 6 to 7 (#24)

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 6 to 7.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v6...v7)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: '7'
  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/validate-pipeline.yml

diff --git a/.github/workflows/validate-pipeline.yml b/.github/workflows/validate-pipeline.yml
index fee6c46..f4e1d0d 100644
--- a/.github/workflows/validate-pipeline.yml
+++ b/.github/workflows/validate-pipeline.yml
@@ -41,7 +41,7 @@
         - name: Build with Maven
           run: mvn -B package --file pom.xml
         - name: Set up python
-          uses: actions/setup-python@v6
+          uses: actions/setup-python@v7
           with:
             python-version: '3.12'
         - name: Set up Apache Beam Yaml