Increment version to 2.8.1-SNAPSHOT

Signed-off-by: opensearch-ci-bot <opensearch-infra@amazon.com>

Author: opensearch-ci-bot

.github/workflows/backwards_compatibility_tests_workflow.yml

@@ -14,8 +14,8 @@ jobs:
     strategy:
       matrix:
         java: [ 11, 17 ]
-        bwc_version : [ "1.1.0", "1.2.4", "1.3.8", "2.0.1", "2.1.0", "2.2.1", "2.3.0", "2.4.1", "2.5.0", "2.6.0", "2.7.0" ]
-        opensearch_version : [ "2.8.0-SNAPSHOT" ]
+        bwc_version : [ "1.1.0", "1.2.4", "1.3.8", "2.0.1", "2.1.0", "2.2.1", "2.3.0", "2.4.1", "2.5.0", "2.6.0", "2.7.0", "2.8.0" ]
+        opensearch_version : [ "2.8.1-SNAPSHOT" ]
 
     name: k-NN Restart-Upgrade BWC Tests
     runs-on: ubuntu-latest
@@ -46,8 +46,8 @@ jobs:
     strategy:
       matrix:
         java: [ 11, 17 ]
-        bwc_version: [ "1.3.8", "2.0.1", "2.1.0", "2.2.1", "2.3.0", "2.4.1", "2.5.0", "2.6.0", "2.7.0"]
-        opensearch_version: [ "2.8.0-SNAPSHOT" ]
+        bwc_version: [ "1.3.8", "2.0.1", "2.1.0", "2.2.1", "2.3.0", "2.4.1", "2.5.0", "2.6.0", "2.7.0", "2.8.0"]
+        opensearch_version: [ "2.8.1-SNAPSHOT" ]
 
     name: k-NN Rolling-Upgrade BWC Tests
     runs-on: ubuntu-latest

build.gradle

@@ -10,7 +10,7 @@ buildscript {
     ext {
         // build.version_qualifier parameter applies to knn plugin artifacts only. OpenSearch version must be set
         // explicitly as 'opensearch.version' property, for instance opensearch.version=2.0.0-rc1-SNAPSHOT
-        opensearch_version = System.getProperty("opensearch.version", "2.8.0-SNAPSHOT")
+        opensearch_version = System.getProperty("opensearch.version", "2.8.1-SNAPSHOT")
         version_qualifier = System.getProperty("build.version_qualifier", "")
         opensearch_group = "org.opensearch"
     }