chore: update scripts/update-gradle.sh to v8.12.1

Author: web-flow

CHANGELOG.md

@@ -8,6 +8,12 @@
   - Previously `java.lang.ClassNotFoundException: io.sentry.opentelemetry.OtelContextScopesStorage` was shown in the log if the class could not be found.
   - This is just a lookup the SDK performs to configure itself. The SDK also works without OpenTelemetry.
 
+### Dependencies
+
+- Bump Gradle from v8.5.0 to v8.12.1 ([#4106](https://github.com/getsentry/sentry-java/pull/4106))
+  - [changelog](https://github.com/gradle/gradle/blob/master release-test/CHANGELOG.md#v8121)
+  - [diff](https://github.com/gradle/gradle/compare/v8.5.0...v8.12.1)
+
 ## 8.1.0
 
 ### Features

gradle/wrapper/gradle-wrapper.jar

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12.1-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME