dependencies: allow Rose 2.7.0 (#409)

Rose feature release contains no breaking changes for cylc-rose.

Author: oliver-sanders

setup.cfg

@@ -50,7 +50,7 @@ packages = find_namespace:
 python_requires = >=3.12
 include_package_data = True
 install_requires =
-    metomi-rose==2.6.*
+    metomi-rose>=2.6.0,<2.8.0
     cylc-flow==8.6.*
     metomi-isodatetime
     ansimarkup