Merge pull request #10659 from Icinga/backport-10637-to-support/2.14

[Backport support/2.14] GitHub actions: add Fedora 43

Author: yhabteab

.github/workflows/linux.yml

@@ -36,6 +36,7 @@ jobs:
 
           - fedora:41
           - fedora:42
+          - fedora:43
 
           - opensuse/leap:15.6