fix(fedora.conf): vi binary is missing

/usr/bin/vi is just a wrapper shell script to run /usr/libexec/vi which is the vi binary.
/usr/bin/vi is available in initrd.img, but /usr/libexec/vi is missing.
As as result, vi command never works.
This PR is to add /usr/libexec/vi.

dracut.conf.d/fedora.conf.example

@@ -8,7 +8,7 @@ i18n_install_all="yes"
 
 stdloglvl=3
 sysloglvl=5
-install_optional_items+=" vi /etc/virc ps grep cat rm "
+install_optional_items+=" vi /usr/libexec/vi /etc/virc ps grep cat rm "
 prefix="/"
 environment=/usr/lib/environment.d
 environmentconfdir=/etc/environment.d