github_actions_ci: Update CHANGELOG and RELEASE-NOTES for shield-1.15.4

Author: draios-jenkins

charts/shield/CHANGELOG.md

@@ -10,6 +10,9 @@ Manual edits are supported only below '## Change Log' and should be used
 exclusively to fix incorrect entries and not to add new ones.
 
 ## Change Log
+# v1.15.4
+### Bug Fixes
+* **shield** [ff026255](https://github.com/sysdiglabs/charts/commit/ff026255c116a35e16c6835473ee8bda578a8ac8): Sanitize version label on shield objects ([#2346](https://github.com/sysdiglabs/charts/issues/2346))
 # v1.15.3
 ### Documentation
 * **agent** [1f478085](https://github.com/sysdiglabs/charts/commit/1f47808574f81c12f656a762c23464f458e1e524): Add App Checks example as comments ([#2340](https://github.com/sysdiglabs/charts/issues/2340))

charts/shield/RELEASE-NOTES.md

@@ -1,5 +1,5 @@
 # What's Changed
 
-### Documentation
-- **agent** [1f478085](https://github.com/sysdiglabs/charts/commit/1f47808574f81c12f656a762c23464f458e1e524): Add App Checks example as comments ([#2340](https://github.com/sysdiglabs/charts/issues/2340))
-#### Full diff: https://github.com/sysdiglabs/charts/compare/shield-1.15.2...shield-1.15.3
+### Bug Fixes
+- **shield** [ff026255](https://github.com/sysdiglabs/charts/commit/ff026255c116a35e16c6835473ee8bda578a8ac8): Sanitize version label on shield objects ([#2346](https://github.com/sysdiglabs/charts/issues/2346))
+#### Full diff: https://github.com/sysdiglabs/charts/compare/shield-1.15.3...shield-1.15.4