mkosi: Add CI for CentOS Stream 10

We switch to the c10s-sig-hyperscale branch of the spec repository
as it will receive all the latest changes the earliest before they
end up in the c9s-sig-hyperscale branch.

.github/workflows/mkosi.yml

@@ -96,6 +96,12 @@ jobs:
             llvm: 0
             cflags: "-Og"
             relabel: yes
+          - distro: centos
+            release: "10"
+            sanitizers: ""
+            llvm: 0
+            cflags: "-Og"
+            relabel: yes
 
     steps:
     - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332

mkosi.images/build/mkosi.conf.d/centos/mkosi.conf

@@ -10,5 +10,5 @@ Packages=
 
 Environment=
         GIT_URL=https://git.centos.org/rpms/systemd.git
-        GIT_BRANCH=c9s-sig-hyperscale
+        GIT_BRANCH=c10s-sig-hyperscale
         GIT_COMMIT=46480aaa9e0ea63a85b6ca676554ce2aae10ce36