gitlab-backup: There is no need to use ';' in inner block of need_gitlab_config()

It works ok without it:

    ---- 8< ---- z.sh
    #!/bin/bash -e

    {
        read A
        read B
    } < <(echo -e 'AAA\nBBB')

    echo $A
    echo $B
    ---- 8< ----

    $ ./z.sh
    AAA
    BBB
    $ echo $?
    0

/cc @kazuhiko

contrib/gitlab-backup

@@ -26,8 +26,8 @@ need_gitlab_config() {
 
     # various gitlab config values extracted in 1 go (gitlab is very slow to load)
     {
-        read GITLAB_BACKUP_PATH;
-        read GITLAB_REPOS_PATH;
+        read GITLAB_BACKUP_PATH
+        read GITLAB_REPOS_PATH
     } < <(gitlab-rails r 'puts Gitlab.config.backup.path, Gitlab.config.gitlab_shell.repos_path')
 
     test -n "$GITLAB_BACKUP_PATH"   || die "E: cannot detect GITLAB_BACKUP_PATH"