Push updates to the sparse blog and the semantic search blog to prod

_authors/xinyual.markdown

@@ -5,4 +5,4 @@ photo: '/assets/media/authors/xinyual.jpg'
 github: xinyual
 ---
 
-**Xinyuan Lu** is a machine learning engineer with the OpenSearch project. He is working on large language model(LLM) related applications and search relevance.
+**Xinyuan Lu** is a machine learning engineer with the OpenSearch Project. He works on large language model (LLM)-related applications and search relevance.

_authors/yych.markdown

@@ -5,4 +5,4 @@ photo: '/assets/media/authors/yych.png'
 github: model-collapse
 ---
 
-**Charlie Yang** is an AWS engineering manager working on the OpenSearch Project. He is focusing on machine learning, search relevance and performance optimization.
+**Charlie Yang** is an AWS engineering manager with the OpenSearch Project. He focuses on machine learning, search relevance, and performance optimization.

_authors/zanniu.markdown

@@ -0,0 +1,8 @@
+---
+name: Zan Niu
+short_name: zanniu
+photo: '/assets/media/authors/zanniu.jpeg'
+github: zane-neo
+---
+
+**Zan Niu** is a software engineer at Amazon Web Services. He primarily works on OpenSearch machine learning plugins (ml-commons). He is passionate about high performance architecture, distribute system and machine learning.

_authors/zhichaog.markdown

@@ -5,4 +5,4 @@ photo: '/assets/media/authors/zhichaog.png'
 github: zhichao-aws
 ---
 
-**Zhichao Geng** is a machine learning engineer working on OpenSearch. His interest is improving search relevance using machine learning.
+**Zhichao Geng** is a machine learning engineer with the OpenSearch Project. His interests include improving search relevance using machine learning.