bump up to 2.19.3 (#1042)

Signed-off-by: Surya Sashank Nistala <snistala@amazon.com>

Author: eirsep

notifications/build.gradle

@@ -6,7 +6,7 @@
 
 buildscript {
     ext {
-        opensearch_version = System.getProperty("opensearch.version", "2.19.2-SNAPSHOT")
+        opensearch_version = System.getProperty("opensearch.version", "2.19.3-SNAPSHOT")
         isSnapshot = "true" == System.getProperty("build.snapshot", "true")
         buildVersionQualifier = System.getProperty("build.version_qualifier", "")
         // 2.3.0-SNAPSHOT -> 2.3.0.0-SNAPSHOT