Bump Server version to 1.28.3 (#9554)

## What changed?
Bump server version to 1.28.3 for the upcoming patch release.

## Why?
Prepare for v1.28.3 patch release, which includes:
- Bump x/crypto, x/net, and Go 1.24.13 to address CVEs (#9440)
- Bump elasticsearch8 image to 8.5.0 (#9497)

## How did you test it?
- [x] covered by existing tests

Made with [Cursor](https://cursor.com)

Author: rkannan82

common/headers/version_checker.go

@@ -24,7 +24,7 @@ const (
 
 	// ServerVersion value can be changed by the create-tag Github workflow.
 	// If you change the var name or move it, be sure to update the workflow.
-	ServerVersion = "1.28.2"
+	ServerVersion = "1.28.3"
 
 	// SupportedServerVersions is used by CLI and inter role communication.
 	SupportedServerVersions = ">=1.0.0 <2.0.0"