Adjust bwc versions after 2.19 release

Signed-off-by: Martin Gaievski <gaievski@amazon.com>

Author: martin-gaievski

.github/workflows/backwards_compatibility_tests_workflow.yml

@@ -15,7 +15,7 @@ jobs:
       matrix:
         java: [ 21, 23 ]
         os: [ubuntu-latest]
-        bwc_version : ["2.9.0","2.10.0","2.11.0","2.12.0","2.13.0","2.14.0","2.15.0","2.16.0","2.17.0","2.18.0","2.19.0-SNAPSHOT","2.20.0-SNAPSHOT"]
+        bwc_version : ["2.9.0","2.10.0","2.11.0","2.12.0","2.13.0","2.14.0","2.15.0","2.16.0","2.17.0","2.18.0","2.19.0","2.20.0-SNAPSHOT"]
         opensearch_version : [ "3.0.0-SNAPSHOT" ]
 
     name: NeuralSearch Restart-Upgrade BWC Tests

gradle.properties

@@ -7,7 +7,7 @@
 # https://github.com/opensearch-project/OpenSearch/blob/main/libs/core/src/main/java/org/opensearch/Version.java .
 # Wired compatibility of OpenSearch works like 3.x version is compatible with 2.(latest-major) version.
 # Therefore, to run rolling-upgrade BWC Test on local machine the BWC version here should be set 2.(latest-major).
-systemProp.bwc.version=2.19.0-SNAPSHOT
+systemProp.bwc.version=2.20.0-SNAPSHOT
 systemProp.bwc.bundle.version=2.19.0
 
 # For fixing Spotless check with Java 17