Changes to use f-strings instead of format

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 78.26087% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 85.24%. Comparing base (ed8a139) to head (9dd0f61).

Files	Patch %	Lines
plaso/engine/timeliner.py	33.33%	4 Missing :warning:
plaso/engine/path_filters.py	75.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #4840 +/- ## ========================================== - Coverage 85.24% 85.24% -0.01% ========================================== Files 426 426 Lines 38532 38525 -7 ========================================== - Hits 32847 32841 -6 + Misses 5685 5684 -1 ```

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