Fixed #32610 -- Fixed get_git_changeset() on Linux.

shell=True is required on Windows. Unfortunately passing a sequence to
subprocess.run() behaves differently on Linux, i.e. the first item
specifies the command string, and any additional items are treated as
additional arguments to the shell itself.

https://docs.python.org/3.9/library/subprocess.html#subprocess.Popen
https://docs.python.org/3.9/library/subprocess.html#converting-an-argument-sequence-to-a-string-on-windows

Regression in a44d80f88e.

django/utils/version.py

@@ -79,7 +79,7 @@ def get_git_changeset():
     """
     repo_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
     git_log = subprocess.run(
-        ['git', 'log', '--pretty=format:%ct', '--quiet', '-1', 'HEAD'],
+        'git log --pretty=format:%ct --quiet -1 HEAD',
         stdout=subprocess.PIPE, stderr=subprocess.PIPE,
         shell=True, cwd=repo_dir, universal_newlines=True,
     )