fix: Fixed GH-3492, Fixed the SQL error in the isTableExists method of MariaDBSchemaValidator.

Signed-off-by: Sun Yuhan <sunyuhan1998@users.noreply.github.com>
(cherry picked from commit b925c50)

Author: sunyuhan1998

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

@@ -45,12 +45,11 @@ public MariaDBSchemaValidator(JdbcTemplate jdbcTemplate) {
 
 	private boolean isTableExists(String schemaName, String tableName) {
 		// schema and table are expected to be escaped
-		String sql = String.format(
-				"SELECT 1 FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = %s AND TABLE_NAME = %s",
-				(schemaName == null) ? "SCHEMA()" : schemaName, tableName);
+		String sql = "SELECT 1 FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = ? AND TABLE_NAME = ?";
 		try {
 			// Query for a single integer value, if it exists, table exists
-			this.jdbcTemplate.queryForObject(sql, Integer.class);
+			this.jdbcTemplate.queryForObject(sql, Integer.class, (schemaName == null) ? "SCHEMA()" : schemaName,
+					tableName);
 			return true;
 		}
 		catch (DataAccessException e) {