Fix --use-ssh-url -> --use-ssh-url? like use-curl? is

Author: Retropikzel

lib/chibi/snow/commands.scm

@@ -715,7 +715,7 @@
          (dir (path-directory repo-path))
          (fix-git-url
            (lambda (cfg url-pair)
-             (let* ((use-ssh-url? (conf-get cfg '(command git-index use-ssh-url)))
+             (let* ((use-ssh-url? (conf-get cfg '(command git-index use-ssh-url?)))
                     (url (cadr url-pair)))
                `(url ,(cond
                         ((and (string-prefix? "git@" url) use-ssh-url?) url)

tools/snow-chibi.scm

@@ -159,7 +159,7 @@
 (define index-spec
   '())
 (define git-index-spec
-  '(use-ssh-url boolean))
+  '(use-ssh-url? boolean))
 (define update-spec
   '())
 (define implementations-spec