Add support for Fedora 44 and Ubuntu 26.04 in the README (#38)

Author: dwydler

README.md

@@ -266,13 +266,15 @@ debian-12          Debian 12
 debian-13          Debian 13
 fedora-42          Fedora 42
 fedora-43          Fedora 43
+fedora-44          Fedora 44
 opensuse-15        openSUSE Leap 15
 opensuse-16        openSUSE Leap 16
 rocky-10           Rocky Linux 10
 rocky-8            Rocky Linux 8
 rocky-9            Rocky Linux 9
 ubuntu-22.04       Ubuntu 22.04
 ubuntu-24.04       Ubuntu 24.04
+ubuntu-26.04       Ubuntu 26.04
 ```
 
 **List ARM Images:**