Update Fedora placeholder to include the same "community" and "pre-1.0" warnings so we don't forget them

docs/sources/installation/fedora.rst

@@ -7,6 +7,10 @@
 Fedora
 ======
 
+.. include:: install_header.inc
+
+.. include:: install_unofficial.inc
+
 .. warning::
 
    This is a placeholder for the Fedora installation instructions. Currently there is not an available