Updated name of filename in list of exceptions after renamings

Author: oleksandr-pavlyk

.flake8

@@ -32,5 +32,5 @@ per-file-ignores =
     dpctl/utils/_onetrace_context.py: E501, W505
     dpctl/tensor/_array_api.py: E501, W505
     examples/cython/sycl_buffer/syclbuffer/_syclbuffer.pyx: E999, E225, E402
-    examples/cython/usm_memory/blackscholes/blackscholes.pyx: E999, E225, E226, E402
+    examples/cython/usm_memory/blackscholes/_blackscholes_usm.pyx: E999, E225, E226, E402
     examples/cython/use_dpctl_sycl/use_dpctl_sycl/_cython_api.pyx: E999, E225, E226, E402