Fix license classifier

[ktbyers]

This change is needed for the Nornir 3.5.0 release (as pypi is rejected the classifier that we specified in #976)

[ktbyers]

This PR reverts the classifier part of this PR (as it was incorrect):

#976

[ktbyers]

Additional notes:

Pypi rejected uploaded of Nornir 3.5.0 with:

WARNING  Error during upload. Retry with the --verbose option for more details.                                                     
ERROR    HTTPError: 400 Bad Request from https://upload.pypi.org/legacy/                                                            
         'License :: OSI Approved :: Apache Software License 2.0 (Apache-2.0)' is not a valid classifier. See                       
         https://packaging.python.org/specifications/core-metadata for more information.

Also the classifier never accepted the change that was in the referenced issue (see):

https://github.com/pypa/trove-classifiers/blob/main/src/trove_classifiers/__init__.py#L283

[ktbyers]

I checked both the METADATA file and the PKG-INFO file and the Properietary License referfence was gone (after reverting the classifier part of this).

So the original issue #975 should still be fixed.

[coveralls]

Pull Request Test Coverage Report for Build 12622031701

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 56.799%

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Totals
Change from base Build 12621529027:	0.0%
Covered Lines:	543
Relevant Lines:	956

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💛 - Coveralls

[ogenstad]

So we think that the initial issue might have been resolved by this change:

-license = "Apache 2.0"
+license = "Apache-2.0"

But that other metadata change caused some other violation?

[ktbyers]

@ogenstad Yes, the hyphen fixed the original METADATA issue (I verified this).

The classifier change was wrong and broke the pypi upload.