Tweak action

.github/workflows/notebook-test.yml

@@ -88,7 +88,7 @@ jobs:
           import subprocess
           subprocess.run(
             "echo \"c.InlineBackend.figure_format = 'svg'\" >> ~/.ipython/profile_default/ipython_kernel_config.py",
-            shell=False
+            shell=True
           )
           files = """${{ steps.all-changed-files.outputs.all_changed_files }}"""
           args = ["tox", "--"] + files.split("\n") + ["--write"]