Update version matrix in README.md

Author: jdreesen

README.md

@@ -350,7 +350,7 @@ container:
 | Version | Released     | PHPUnit       | Status     |
 |---------|--------------|---------------|------------|
 | 6.x     | Aug 8, 2024  | 10.5 and 11.x | Latest     |
-| 5.x     | Nov 22, 2023 | 9.6 and 10.x  | Latest     |
+| 5.x     | Nov 22, 2023 | 9.6 and 10.x  | Bugfixes   |
 | 4.x     | Mar 28, 2019 | 8.x and 9.x   | Bugfixes   |
 | 3.x     | Mar 5, 2018  | 7.x           | Bugfixes   |
 | 2.x     | May 9, 2017  | 6.x           | Bugfixes   |