Fix punctuation

Corrected punctuation in the Nexus description.

Author: jsundai

docs/encyclopedia/nexus/nexus.mdx

@@ -29,7 +29,7 @@ This page explains what Nexus is and how it works. To evaluate whether Nexus fit
 :::
 
 As a platform grows, coordinating work across teams and applications becomes increasingly difficult. 
-Nexus lets teams selectively expose functionality that other teams can discover and reuse, without exposing their internal implementation details.. 
+Nexus lets teams selectively expose functionality that other teams can discover and reuse, without exposing their internal implementation details.
 This approach makes it easier to build new applications by reusing what already exists, forming the foundation for a more modular and collaborative platform.
 
 ## What is Nexus?