Fix yugabytedb docs (#6226)

Currently, the string version is not displayed.

Author: eddumelendez

modules/yugabytedb/src/test/java/org/testcontainers/junit/yugabytedb/YugabyteDBYCQLTest.java

@@ -23,7 +23,9 @@ public class YugabyteDBYCQLTest {
     public void testSmoke() {
         try (
             // creatingYCQLContainer {
-            final YugabyteDBYCQLContainer ycqlContainer = new YugabyteDBYCQLContainer(IMAGE_NAME)
+            final YugabyteDBYCQLContainer ycqlContainer = new YugabyteDBYCQLContainer(
+                "yugabytedb/yugabyte:2.14.4.0-b26"
+            )
             // }
         ) {
             // startingYCQLContainer {

modules/yugabytedb/src/test/java/org/testcontainers/junit/yugabytedb/YugabyteDBYSQLTest.java

@@ -24,7 +24,9 @@ public class YugabyteDBYSQLTest extends AbstractContainerDatabaseTest {
     public void testSmoke() throws SQLException {
         try (
             // creatingYSQLContainer {
-            final YugabyteDBYSQLContainer ysqlContainer = new YugabyteDBYSQLContainer(IMAGE_NAME)
+            final YugabyteDBYSQLContainer ysqlContainer = new YugabyteDBYSQLContainer(
+                "yugabytedb/yugabyte:2.14.4.0-b26"
+            )
             // }
         ) {
             // startingYSQLContainer {