Fix vulnerability issue on docs dependency (#1313)

Fix:
https://github.com/astronomer/astronomer-cosmos/security/dependabot/8

More details about the vulnerability:
> Airflow versions before 2.10.3 have a vulnerability that allows
authenticated users with audit log access to see sensitive values in
audit logs which they should not see. When sensitive variables were set
via airflow CLI, values of those variables appeared in the audit log and
were stored unencrypted in the Airflow database. While this risk is
limited to users with audit log access, upgrading to Airflow 2.10.3 or a
later version is recommended, which addresses this issue. Users who
previously used the CLI to set secret variables should manually delete
entries with those variables from the log table.

docs/requirements.txt

@@ -1,5 +1,5 @@
 aenum
-apache-airflow==2.10.2
+apache-airflow~=2.10.3
 PyAthena==3.9.0
 redshift-connector==2.1.3
 fsspec==2024.6.1