Update ghcr.io/singlestore-labs/singlestoredb-dev Docker tag to v0.2.8 (PlaytikaOSS#1409)

| datasource | package                                    | from  | to    |
| ---------- | ------------------------------------------ | ----- | ----- |
| docker     | ghcr.io/singlestore-labs/singlestoredb-dev | 0.2.6 | 0.2.8 |

Co-authored-by: Renovate Bot <[email protected]>

Author: Fameing

embedded-memsql/README.adoc

@@ -16,7 +16,7 @@
 
 * `embedded.memsql.enabled` `(true|false, default is true)`
 * `embedded.memsql.reuseContainer` `(true|false, default is false)`
-* `embedded.memsql.dockerImage` `(default is 'ghcr.io/singlestore-labs/singlestoredb-dev:0.2.6')`
+* `embedded.memsql.dockerImage` `(default is 'ghcr.io/singlestore-labs/singlestoredb-dev:0.2.8')`
 ** Image versions on https://github.com/singlestore-labs/singlestoredb-dev-image[gitHub]
 [NOTE]
 ====

embedded-memsql/src/main/java/com/playtika/testcontainer/memsql/MemSqlProperties.java

@@ -28,6 +28,6 @@ public class MemSqlProperties extends CommonContainerProperties {
     public String getDefaultDockerImage() {
         // Please don`t remove this comment.
         // renovate: datasource=docker
-        return "ghcr.io/singlestore-labs/singlestoredb-dev:0.2.6";
+        return "ghcr.io/singlestore-labs/singlestoredb-dev:0.2.8";
     }
 }