Fix alerts detected by new isort ruff rules

After adding extend-select = ["I"]:
	run format .

Author: DimitriPapadopoulos

examples/btune.py

@@ -11,10 +11,10 @@
 # https://github.com/Blosc/blosc2_btune/blob/main/README.md
 #######################################################################
 
+import blosc2_btune
 import numpy as np
 
 import blosc2
-import blosc2_btune
 
 nchunks = 10
 # Set the compression and decompression parameters, use BTUNE tuner

tests/test_pathlib.py

@@ -6,9 +6,10 @@
 # LICENSE file in the root directory of this source tree)
 #######################################################################
 
+import pathlib
+
 import numpy as np
 import pytest
-import pathlib
 
 import blosc2