update server pagination documentation language

Author: peaster

docs/specification/2024-11-05/server/utilities/pagination.md

@@ -17,7 +17,7 @@ data sets.
 Pagination in MCP uses an opaque cursor-based approach, instead of numbered pages.
 
 - The **cursor** is an opaque string token, representing a position in the result set
-- **Page size** is determined by the server, and **MUST NOT** be fixed
+- **Page size** is determined by the server, and clients **MUST NOT** assume a fixed page size
 
 ## Response Format
 

docs/specification/2025-03-26/server/utilities/pagination.md

@@ -17,8 +17,7 @@ data sets.
 Pagination in MCP uses an opaque cursor-based approach, instead of numbered pages.
 
 - The **cursor** is an opaque string token, representing a position in the result set
-- **Page size** is determined by the server, and **MUST NOT** be fixed
-
+- **Page size** is determined by the server, and clients **MUST NOT** assume a fixed page size
 ## Response Format
 
 Pagination starts when the server sends a **response** that includes: