Release: update changelog for 10.4.19 (#105840)

* Update changelog

* empty commit

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Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: idastambuk <ida.stambuk@grafana.com>

CHANGELOG.md

@@ -1,3 +1,13 @@
+<!-- 10.4.19 START -->
+
+# 10.4.19 (2025-05-22)
+
+### Features and enhancements
+
+- **Chore:** Bump Go version to 1.24.3 [#105115](https://github.com/grafana/grafana/pull/105115), [@macabu](https://github.com/macabu)
+- **Dependencies:** Bump golang.org/x/net from v0.37.0 to v0.40.0 [#105449](https://github.com/grafana/grafana/pull/105449), [@macabu](https://github.com/macabu)
+
+<!-- 10.4.19 END -->
 <!-- 12.0.0+security-01 START -->
 
 # 12.0.0+security-01 (2025-05-21)