fixed typo

readme.md

@@ -5,7 +5,7 @@ in debug mode (SNFDebugClient) to demonstrate how XCI is called and what to expe
 # ChangeLog / Journal
 
 ## 20200617_M
-- Moved the changelog.md file to readme.md so that it can server both purposes.
+- Moved the changelog.md file to readme.md so that it can serve both purposes.
 - Readme is visible immediately in most online git repo's.
 - It's better to have one file tell the story than many.