Fix errors in registry entries created when python is installed with --register

[DavidCEllis]

Fixes for #656

Fix typo in the registry entry names:

• 'DiplayName' is corrected to 'DisplayName' (missing 's')

Correctly identifies 32-bit Python installed on a 64-bit machine:

• 'DisplayName' will now show '(32-bit)' instead of '(64-bit)' for 32 bit installs
• 'SysArchitecture' will now show '32bit' instead of '64bit' for 32 bit installs
• 'Version' no longer includes '-win32' for 32 bit installs
• 'Company' and 'Tag' are unchanged
  • eg a 32 bit Python 3.12.5 install will still be under PythonCore\3.12.5-win32 as it was before.

These changes match the values you get if you install 32 bit python for the current user through the python.org installers (apart from pyenv-win using the 3 part version number and -win32 instead of -32 in the 'Tag').