fix: Fix MariaDBSchemaValidator misleading escaped space error

Fixes an issue in MariaDBSchemaValidator where a text block contained
a misleading escaped space (\s) not at the end of a line, causing
compilation errors like:
[MisleadingEscapedSpace] Using \s anywhere except at the end of a line
in a text block is potentially misleading.

Signed-off-by: Weihua Tan <andy1199@qq.com>
(cherry picked from commit 9acc2d7)

Author: andy1199

vector-stores/spring-ai-mariadb-store/src/main/java/org/springframework/ai/vectorstore/mariadb/MariaDBSchemaValidator.java

@@ -76,7 +76,7 @@ void validateTableSchema(String schemaName, String tableName, String idFieldName
 			logger.error("""
 					Failed to validate that database supports VECTOR.
 					Run the following SQL commands:
-					   SELECT @@version;\s
+					   SELECT @@version;
 					And ensure that version is >= 11.7.1""");
 			throw new IllegalStateException(e);
 		}