Maintenance: Update Ruby version info for 6.5 / Ruby 3.2.7

Author: mgruner

prerequisites/software.rst

@@ -81,7 +81,8 @@ different Zammad versions:
    :header: "Zammad", "Ruby"
    :widths: 20, 20
 
-   "6.3.1+", "3.2.4"
+   "6.5+", "3.2.7"
+   "6.3.1 - 6.4", "3.2.4"
    "6.3.0", "3.2.3"
    "5.4 - 6.2", "3.1.3"
    "5.2 - 5.3", "3.0.4"