github actions: Add GitPython to clk-rebase

lt_rebase.sh now calls update-lt-spec.py, which require GitPython.

Author: bmastbergen

.github/workflows/clk-rebase.yml

@@ -56,7 +56,7 @@ jobs:
         run: |
           dnf install epel-release -y
           dnf groupinstall 'Development Tools' -y
-          dnf install --enablerepo=crb bc dwarves elfutils-libelf-devel grubby grub2-tools iproute jq kernel-devel openssl-devel qemu-kvm sudo virtme-ng -y
+          dnf install --enablerepo=crb bc dwarves elfutils-libelf-devel grubby grub2-tools iproute jq kernel-devel openssl-devel python3-GitPython qemu-kvm sudo virtme-ng -y
 
           # kernel_kselftest.sh calls sudo even when running as root
           # Allow sudo to work without warnings in these cases