mcp: fix comments (#221)

### change:
Fix typos in some comments.

mcp/server.go

@@ -215,7 +215,7 @@ func (s *Server) RemoveResources(uris ...string) {
 		func() bool { return s.resources.remove(uris...) })
 }
 
-// AddResourceTemplate adds a [ResourceTemplate] to the server, or replaces on with the same URI.
+// AddResourceTemplate adds a [ResourceTemplate] to the server, or replaces one with the same URI.
 // AddResourceTemplate panics if a URI template is invalid or not absolute (has an empty scheme).
 func (s *Server) AddResourceTemplate(t *ResourceTemplate, h ResourceHandler) {
 	s.changeAndNotify(notificationResourceListChanged, &ResourceListChangedParams{},

mcp/shared.go

@@ -86,7 +86,7 @@ func defaultSendingMethodHandler[S Session](ctx context.Context, session S, meth
 	return res, nil
 }
 
-// Helper methods to avoid typed nil.
+// Helper method to avoid typed nil.
 func orZero[T any, P *U, U any](p P) T {
 	if p == nil {
 		var zero T