add 1.21 catg

Libraries/Versions/Release-Candidate/1.21.1-rc1.md

@@ -2,6 +2,7 @@
 version-image-link: https://image.stapxs.cn/i/2024/08/07/1.21.1-rc1_header-1.jpg
 server-jar: https://piston-data.mojang.com/v1/objects/e56720aba46f7f07238c4c054a160fc942da9f78/server.jar
 translator: 最亮的信标
+cats: ['1.21']
 ---
 ## 更改
 * 增加了索西语与白俄罗斯语（拉丁）的支持