github_actions_ci: Update CHANGELOG and RELEASE-NOTES for shield-1.21.2

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
+# v1.21.2
+### Chores
+* **shield,cluster-shield** [dc7f70f4](https://github.com/sysdiglabs/charts/commit/dc7f70f4816d5c9463d09f51c4acfb3d21504c74): Automatic bump to version 1.16.1 ([#2412](https://github.com/sysdiglabs/charts/issues/2412))
 # v1.21.1
 ### New Features
 * **agent,shield,sysdig-deploy** [1eb395b7](https://github.com/sysdiglabs/charts/commit/1eb395b7320bf7d0f5de52e024ce2ec3fbd612eb): release agent 14.2.2 ([#2405](https://github.com/sysdiglabs/charts/issues/2405))

charts/shield/RELEASE-NOTES.md

@@ -1,5 +1,5 @@
 # What's Changed
 
-### New Features
-- **agent,shield,sysdig-deploy** [1eb395b7](https://github.com/sysdiglabs/charts/commit/1eb395b7320bf7d0f5de52e024ce2ec3fbd612eb): release agent 14.2.2 ([#2405](https://github.com/sysdiglabs/charts/issues/2405))
-#### Full diff: https://github.com/sysdiglabs/charts/compare/shield-1.21.0...shield-1.21.1
+### Chores
+- **shield,cluster-shield** [dc7f70f4](https://github.com/sysdiglabs/charts/commit/dc7f70f4816d5c9463d09f51c4acfb3d21504c74): Automatic bump to version 1.16.1 ([#2412](https://github.com/sysdiglabs/charts/issues/2412))
+#### Full diff: https://github.com/sysdiglabs/charts/compare/shield-1.21.1...shield-1.21.2