Update README

Author: charsbar

README.md

@@ -36,7 +36,8 @@ Dockerfile to test MT.
 |noble|ubuntu:noble|5.38.2|8.3.6|8.4.3|3.0.13|-|
 |amazonlinux|amazonlinux:2|5.16.3|7.4.33|MariaDB 5.5.68|1.0.2k|-|
 |amazonlinux2022 (\*4)|amazonlinux:2023|5.32.1|8.3.7|MariaDB 10.5.25|3.0.8|-|
-|oracle8 (\*3)|oraclelinux:8|5.26.3|8.2.27|MariaDB 10.3.39|1.1.1k|-|
+|oracle (\*3)|oraclelinux:7-slim|5.16.3|7.4.33|MariaDB 5.5.68|1.0.2k|-|
+|oracle8 (\*3)|oraclelinux:8-slim|5.26.3|8.2.27|MariaDB 10.3.39|1.1.1k|-|
 
 \*2 These images were used to test older versions of MT.
 \*3 with DBD::Oracle 1.80 + OracleInstantClient 21.7