chore: update src/sentry-dotnet to 5.9.0

Author: web-flow

CHANGELOG.md

@@ -11,9 +11,9 @@
 - Bump Java SDK from v8.11.1 to v8.12.0 ([#2155](https://github.com/getsentry/sentry-unity/pull/2155))
   - [changelog](https://github.com/getsentry/sentry-java/blob/main/CHANGELOG.md#8120)
   - [diff](https://github.com/getsentry/sentry-java/compare/8.11.1...8.12.0)
-- Bump .NET SDK from v5.7.0-beta.0 to v5.7.0 ([#2154](https://github.com/getsentry/sentry-unity/pull/2154))
-  - [changelog](https://github.com/getsentry/sentry-dotnet/blob/main/CHANGELOG.md#570)
-  - [diff](https://github.com/getsentry/sentry-dotnet/compare/5.7.0-beta.0...5.7.0)
+- Bump .NET SDK from v5.7.0-beta.0 to v5.9.0 ([#2154](https://github.com/getsentry/sentry-unity/pull/2154), [#2183](https://github.com/getsentry/sentry-unity/pull/2183))
+  - [changelog](https://github.com/getsentry/sentry-dotnet/blob/main/CHANGELOG.md#590)
+  - [diff](https://github.com/getsentry/sentry-dotnet/compare/5.7.0-beta.0...5.9.0)
 - Bump Cocoa SDK from v8.50.1 to v8.51.0 ([#2160](https://github.com/getsentry/sentry-unity/pull/2160), [#2166](https://github.com/getsentry/sentry-unity/pull/2166))
   - [changelog](https://github.com/getsentry/sentry-cocoa/blob/main/CHANGELOG.md#8510)
   - [diff](https://github.com/getsentry/sentry-cocoa/compare/8.50.1...8.51.0)