chore: update modules/sentry-java to 8.1.0

Author: web-flow

CHANGELOG.md

@@ -21,6 +21,9 @@
 - Bump Cocoa SDK from v8.43.0 to v8.44.0 ([#2001](https://github.com/getsentry/sentry-unity/pull/2001))
   - [changelog](https://github.com/getsentry/sentry-cocoa/blob/main/CHANGELOG.md#8440)
   - [diff](https://github.com/getsentry/sentry-cocoa/compare/8.43.0...8.44.0)
+- Bump Java SDK from v7.20.0 to v8.1.0 ([#2002](https://github.com/getsentry/sentry-unity/pull/2002))
+  - [changelog](https://github.com/getsentry/sentry-java/blob/main/CHANGELOG.md#810)
+  - [diff](https://github.com/getsentry/sentry-java/compare/7.20.0...8.1.0)
 
 ## 3.0.0-beta.1