.github/workflows: Update kernel versions for selftests

The 6.10.14 kernel images disappeared from the Fedora mirrors, and the
6.12 kernel has had a few releases since the .0 version.

Signed-off-by: Toke Høiland-Jørgensen <[email protected]>

Author: tohojo

.github/workflows/selftests.yml

@@ -12,8 +12,8 @@ jobs:
     strategy:
       matrix:
         KERNEL_VERSION:
-          - "6.12.0-65.fc42"
-          - "6.10.14-200.fc40"
+          - "6.12.8-200.fc41"
+          - "6.10.12-200.fc40"
           - "6.6.14-200.fc39"
           - "6.1.9-200.fc37"
           - "5.16.8-200.fc35"