update doc for contribution

Signed-off-by: Sienna Chien <siennac@Siennas-MacBook-Air.local>

Author: Sienna Chien

README.md

@@ -1,4 +1,4 @@
 # agent-examples
 
 This repo collects several examples of community agents and MCP tools written in different
-frameworks and exposed with agent-to-agent protocols and tools protocols such as A2A and MCP.
+frameworks and exposed with agent-to-agent protocols and tools protocols such as A2A and MCP.