ci: select patch versions for arm64 kernels

Signed-off-by: Florian Lehner <dev@der-flo.net>

Author: florianl

.github/workflows/example.yml

@@ -64,8 +64,8 @@ jobs:
           # arm64
           - { target_arch: "arm64", kernel_version: "6.6" }
           - { target_arch: "arm64", kernel_version: "6.7" }
-          - { target_arch: "arm64", kernel_version: "6.8" }
-          - { target_arch: "arm64", kernel_version: "6.9" }
+          - { target_arch: "arm64", kernel_version: "6.8.4" }
+          - { target_arch: "arm64", kernel_version: "6.9.1" }
     steps:
       - name: add Docker repo
         run: |