Bump apache-airflow from 2.8.4 to 2.9.0

Bumps [apache-airflow](https://github.com/apache/airflow) from 2.8.4 to 2.9.0.
- [Release notes](https://github.com/apache/airflow/releases)
- [Changelog](https://github.com/apache/airflow/blob/main/RELEASE_NOTES.rst)
- [Commits](apache/airflow@2.8.4...2.9.0)

---
updated-dependencies:
- dependency-name: apache-airflow
  dependency-type: direct:production
...

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

setup.py

@@ -4,7 +4,7 @@
     name="crate-airflow-tutorial",
     packages=find_packages(),
     python_requires=">=3.11",
-    install_requires=["apache-airflow==2.8.4"],
+    install_requires=["apache-airflow==2.9.0"],
     extras_require={
         "develop": [
             "pylint==3.1.0",