fix(build): repositories 块移出 plugins{} (上一次插入位置在块内导致语法错)

build.gradle

@@ -1,7 +1,8 @@
 plugins {
+    id 'com.gtnewhorizons.gtnhconvention'
+}
 
+// TDLM self-hosted maven (SlashBlade 等 TDLM registry 坐标)
 repositories {
     maven { url 'https://home.potatolab.site:3000/api/packages/TDLM/maven' }
-}
-    id 'com.gtnewhorizons.gtnhconvention'
 }