Put the link inside a keyword

Co-authored-by: Petr Šplíchal <psplicha@redhat.com>

Author: LecrisUT

docs/releases/pending/drop_copr_epel6.fmf

@@ -1,3 +1,4 @@
 description: |
-  Copr support for epel6 is dropped as copr.fedoraproject.org does not have
-  that chroot anymore (<https://github.com/fedora-copr/copr/issues/3357>).
+  Copr support for ``epel-6`` is dropped as that chroot has been
+  `removed <https://github.com/fedora-copr/copr/issues/3357>`_
+  from copr.fedoraproject.org a long time ago.