[rpms/cinnamon-control-center] rawhide: Fix devel subpackage description (was copy-pasted from muffin)

[Michal Schorm <mschorm@redhat.com>]

            A new commit has been pushed.

            Repo   : rpms/cinnamon-control-center
            Branch : rawhide
            Commit : 4bad965457dd8bd58eb5bf17cd4bfe9feca3ad30
            Author : Michal Schorm <mschorm@redhat.com>
            Date   : 2026-07-25T15:55:43+02:00
            Stats  : +3/-2 in 1 file(s)
            URL    : https://src.fedoraproject.org/rpms/cinnamon-control-center/c/4bad965457dd8bd58eb5bf17cd4bfe9feca3ad30?branch=rawhide

            Log:
            Fix devel subpackage description (was copy-pasted from muffin)

The '%description devel' text referred to "developing Muffin plugins"
and "testing Metacity/Muffin themes", which is entirely wrong for
cinnamon-control-center. Replace with a description of the actual
package contents.

Debian: https://github.com/linuxmint/cinnamon-control-center/blob/6.7.2-unstable/debian/control#L77-L79

Linux Mint's 'libcinnamon-control-center-dev' uses: "development files
for the cinnamon control center panels library."

Co-Authored-By: Claude AI <noreply@anthropic.com>

---
diff --git a/cinnamon-control-center.spec b/cinnamon-control-center.spec
index 01c05c2..747f444 100644
--- a/cinnamon-control-center.spec
+++ b/cinnamon-control-center.spec
@@ -72,8 +72,9 @@ Summary: Development package for %{name}
 Requires: %{name}%{?_isa} = %{version}-%{release}
 
 %description devel
-Header files and libraries for developing Muffin plugins. Also includes
-utilities for testing Metacity/Muffin themes.
+Development files for the cinnamon-control-center panels library.
+Install this package to build control-center panels or applications
+that link against libcinnamon-control-center.
 
 %prep
 %autosetup -a1 -p1 -n %{name}-%{upstream_version}