Revert gradle distributionUrl to services.gradle.org

mirrors.cloud.tencent.com timed out from GitHub Actions runners.
services.gradle.org works from CI and is reachable from the user's
local network via their existing HTTPS proxy. Maven repo mirrors
(dl.google.cn / Aliyun) stay since they don't affect CI.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: madeye

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://mirrors.cloud.tencent.com/gradle/gradle-8.4-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists