Change 3.0.0 qualifier from alpha1 to beta1 (#808)

Signed-off-by: Craig Perkins <[email protected]>

Author: cwperks

build.gradle

@@ -6,9 +6,9 @@
 buildscript {
     ext {
         opensearch_group = "org.opensearch"
-        opensearch_version = System.getProperty("opensearch.version", "3.0.0-alpha1-SNAPSHOT")
+        opensearch_version = System.getProperty("opensearch.version", "3.0.0-beta1-SNAPSHOT")
         isSnapshot = "true" == System.getProperty("build.snapshot", "true")
-        buildVersionQualifier = System.getProperty("build.version_qualifier", "alpha1")
+        buildVersionQualifier = System.getProperty("build.version_qualifier", "beta1")
         kotlin_version = System.getProperty("kotlin.version", "1.9.25")
     }