bdist_rpm: Fix string concat error due to order of op for + and or in RPM

[ntindle]

Background

When running an rpm build, if you don't have self.distribution.get_description populated, cx_Freeze should use 'UNKNOWN'. However, due to an order of operations bug, it attempts to concat str with None which isn't possible

Changes

• Reformat the string concat to an f-string so that "or" is evaluated before the concat

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 79.77%. Comparing base (406dc8b) to head (04dee2d).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2444 +/- ## ======================================= Coverage 79.77% 79.77% ======================================= Files 27 27 Lines 4089 4089 ======================================= Hits 3262 3262 Misses 827 827 ```

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[marcelotduarte]

Thanks!