feat: fedora repo

- add fedora repo from git.unkin.net to images
- add correct unkin-ca-certificates
- add nfpm to rpmbuilder
- bump base/rpmbuilder images

images/fedora/42/rpmbuilder/variables.auto.pkrvars.hcl

@@ -1,4 +1,4 @@
-# almalinux/9.7/rpmbuilder
+# fedora/42/rpmbuilder
 docker_source = "git.unkin.net/unkin/fedora42-base:latest"
 packages = [
   "asciidoc",
@@ -20,7 +20,7 @@ packages = [
   "intltool",
   "jna",
   "ltrace",
-  #"nfpm",
+  "nfpm",
   "patchutils",
   "perl-Fedora-VSP",
   "perl-generators",

images/fedora/42/rpmbuilder/version

@@ -1 +1 @@
-20260308
+20260521