refined the doc comment

Signed-off-by: Xiaoxuan Wang <[email protected]>

Author: wangxiaoxuan273

content/oci/oci.go

@@ -44,8 +44,10 @@ import (
 type Store struct {
 	// AutoSaveIndex controls if the OCI store will automatically save the index
 	// file when needed.
-	//   - If AutoSaveIndex is set to true, the OCI store will automatically save the
-	//     changes to `index.json` on Tag() and Delete() calls, and when pushing a manifest.
+	//   - If AutoSaveIndex is set to true, the OCI store will automatically save
+	//     the changes to `index.json` when
+	//      1. pushing a manifest
+	//      2. calling Tag() or Delete()
 	//   - If AutoSaveIndex is set to false, it's the caller's responsibility
 	//     to manually call SaveIndex() when needed.
 	//   - Default value: true.