fix(ci): remove epel-release from RPM deps — not available in Fedora

EPEL (Extra Packages for Enterprise Linux) only exists on RHEL/CentOS/
AlmaLinux, not Fedora. Also removed unnecessary systemd-devel and
dbus-devel since rpm.sh builds pre-compiled binary with no BuildRequires.

Author: owaindjones

.github/workflows/ci.yml

@@ -285,10 +285,8 @@ jobs:
 
       - name: Install RPM build dependencies (container)
         run: |
-          dnf install -y epel-release && \
           dnf install -y \
-            rpm-build redhat-rpm-config \
-            systemd-devel dbus-devel gcc make tar gzip
+            rpm-build gcc make tar gzip
 
       - name: Download release tarball
         uses: actions/download-artifact@v4