docs(readme): refresh Nüwa.skill star count 12k+ → 21k+

README.md

@@ -294,7 +294,7 @@ Under the [MIT License](LICENSE) you are free to **use, modify, and distribute**
 
 ## Connect · Huasheng (Huashu)
 
-Huasheng is an AI-native coder, independent developer, and AI content creator. Notable work: Cat Fill Light (App Store Top 1 in Paid category), *A Book on DeepSeek*, Nüwa.skill (GitHub 12k+ stars). Combined 300k+ followers across platforms.
+Huasheng is an AI-native coder, independent developer, and AI content creator. Notable work: Cat Fill Light (App Store Top 1 in Paid category), *A Book on DeepSeek*, Nüwa.skill (GitHub 21k+ stars). Combined 300k+ followers across platforms.
 
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