Fix case where --use-constraints-version VERSION has been broken (a…

…pache#36123)

We are changing the whole mechanism in apache#36094 but since it might
take a bit to review, this is a quick fix to fix --use-airflow-version
pointing to specific airflow version.

dev/breeze/src/airflow_breeze/commands/developer_commands.py

@@ -130,7 +130,7 @@ def _determine_constraint_branch_used(airflow_constraints_reference: str, use_ai
         and re.match(r"[0-9]+\.[0-9]+\.[0-9]+[0-9a-z\.]*|main|v[0-9]_.*", use_airflow_version)
     ):
         get_console().print(f"[info]Using constraints {use_airflow_version} - matching airflow version used.")
-        return use_airflow_version
+        return f"constraints-{use_airflow_version}"
     return airflow_constraints_reference