Update isort version

Signed-off-by: Anand Joseph <anajoseph@nvidia.com>

Author: anand-nv

requirements/requirements_test.txt

@@ -1,6 +1,6 @@
 black==25.1.0
 click>=8.0.2
-isort[requirements]>5.1.0,<6.0.0
+isort[requirements]>5.1.0,<=6.0.1
 parameterized
 pynini==2.1.6.post1
 pytest