CI: fedora: fix "dnf" invocation syntax

In 39e205302e8afb68d954e17944fad5f8c1587287 I erroneously used
"dnf git" instead of "dnf install"

(cherry picked from commit 28e94c619260b4aca1de1213464334bd9b5418c9)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed