feat(platform-paper): set api-version to 1.21.7

Author: U8092

platform-paper/src/main/resources/paper-plugin.yml

@@ -3,7 +3,7 @@ authors:
   - myth-MC
   - U8092
 version: '${project.version}'
-api-version: '1.21'
+api-version: '1.21.7'
 
 main: ovh.mythmc.banco.paper.BancoPaperPlugin
 folia-supported: true