fix: update sources

[potatoeggy]

• manhuaes.com: migrate to manhuaaz.com
• webtoons.com: fix genre detection
• blogtruyenmoi.com: fix description and author

[codecov[bot]]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (8e3d887) 37.64% compared to head (e434d64) 37.57%. Report is 2 commits behind head on master.

Files	Patch %	Lines
mandown/sources/source_blogtruyenmoi.py	0.00%	4 Missing :warning:
mandown/sources/source_webtoons.py	0.00%	2 Missing :warning:
mandown/sources/source_manhuaes.py	75.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #71 +/- ## ========================================== - Coverage 37.64% 37.57% -0.07% ========================================== Files 20 20 Lines 1097 1099 +2 ========================================== Hits 413 413 - Misses 684 686 +2 ```

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