HBX-3033: Update version identifiers in Jenkinsfile to 6.6.21.Final and 6.6.22-SNAPSHOT respectively

Signed-off-by: Koen Aers <[email protected]>

Author: koentsje

ci/release/Jenkinsfile

@@ -36,14 +36,14 @@ pipeline {
 	parameters {
 		string(
 				name: 'RELEASE_VERSION',
-				defaultValue: '6.6.20.Final',
-				description: 'The version to be released, e.g. 6.6.20.Final.',
+				defaultValue: '6.6.21.Final',
+				description: 'The version to be released, e.g. 6.6.21.Final.',
 				trim: true
 		)
 		string(
 				name: 'DEVELOPMENT_VERSION',
-				defaultValue: '6.6.21-SNAPSHOT',
-				description: 'The next version to be used after the release, e.g. 6.6.21-SNAPSHOT.',
+				defaultValue: '6.6.22-SNAPSHOT',
+				description: 'The next version to be used after the release, e.g. 6.6.22-SNAPSHOT.',
 				trim: true
 		)
 		booleanParam(