Merge pull request containerd#8261 from davidhsingyuchen/plugins-err-typo

docs: fix typo in comment of plugin.Plugin.Err()

Author: kzys

plugin/context.go

@@ -80,7 +80,7 @@ type Plugin struct {
 }
 
 // Err returns the errors during initialization.
-// returns nil if not error was encountered
+// returns nil if no error was encountered
 func (p *Plugin) Err() error {
 	return p.err
 }