python3Packages.python-magic: backport fix for file-5.45

Without the change ther build fails on `staging` as:

    [   12s] test/python_magic_test.py:53: in assert_values
    [   12s]     self.assertIn(value, expected_value)
    [   12s] E   AssertionError: 'PDF document, version 1.2, 2 page(s)' not found in ('PDF document, version 1.2', 'PDF document, version 1.2, 2 pages')

pkgs/development/python-modules/python-magic/default.nix

@@ -29,6 +29,14 @@ buildPythonPackage rec {
       url = "https://github.com/ahupp/python-magic/commit/4ffcd59113fa26d7c2e9d5897b1eef919fd4b457.patch";
       hash = "sha256-67GpjlGiR4/os/iZ69V+ZziVLpjmid+7t+gQ2aQy9I0=";
     })
+
+    # Upstream patch to amend test suite for-5.45:
+    #   https://github.com/ahupp/python-magic/pull/290
+    (fetchpatch {
+      name = "file-5.45.patch";
+      url = "https://github.com/ahupp/python-magic/commit/3d2405ca80cd39b2a91decd26af81dcf181390a4.patch";
+      hash = "sha256-HRsnO9MGfMD9BkJdC4SrEFQ1OZEaXpwakXFLoaCPK94=";
+    })
   ];
 
   preCheck = ''