Auto-update changelog (#7247)

Co-authored-by: dd-octo-sts[bot] <200755185+dd-octo-sts[bot]@users.noreply.github.com>

Author: dd-octo-sts[bot]

CHANGELOG.md

@@ -2,6 +2,12 @@
 
 All notable changes to this project will be documented in this file.
 
+### 2026-06 (140 PR merged)
+
+* 2026-06-05 [[ruby] Add new Ruby-lang weblog `ruby_lambda`](https://github.com/DataDog/system-tests/pull/7065) by @Strech
+* 2026-06-01 [SSI GitLab Test Optimization](https://github.com/DataDog/system-tests/pull/6966) by @robertomonteromiguel
+
+
 ### 2026-05 (159 PR merged)
 
 * 2026-05-20 [SSI: Pin agent version to 7.78.4](https://github.com/DataDog/system-tests/pull/6984) by @robertomonteromiguel