Release: update changelog for 11.5.5 (#105888)

* Update changelog

* update changelog

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Kevin Yu <kevinwcyu@users.noreply.github.com>

CHANGELOG.md

@@ -1,3 +1,17 @@
+<!-- 11.5.5 START -->
+
+# 11.5.5 (2025-05-22)
+
+### Features and enhancements
+
+- **Chore:** Bump Go version to 1.24.3 [#105109](https://github.com/grafana/grafana/pull/105109), [@macabu](https://github.com/macabu)
+- **Dependencies:** Bump github.com/blevesearch/bleve/v2 from v2.4.3 to v2.5.0 [#105441](https://github.com/grafana/grafana/pull/105441), [@macabu](https://github.com/macabu)
+- **Dependencies:** Bump github.com/openfga/openfga from v1.8.5 to v1.8.12 [#105373](https://github.com/grafana/grafana/pull/105373), [@macabu](https://github.com/macabu)
+- **Dependencies:** Unpin and bump github.com/getkin/kin-openapi from v0.126.0 to v0.132.0 [#105252](https://github.com/grafana/grafana/pull/105252), [@macabu](https://github.com/macabu)
+- **Security:** Fix CVE-2025-4123
+- **Security:** Fix CVE-2025-3580
+
+<!-- 11.5.5 END -->
 <!-- 11.4.5 START -->
 
 # 11.4.5 (2025-05-22)