[pitivi-web] Make the redirects Moved Permanently

[Alexandru Băluț <alexbalut src gnome org>]

commit c04932dae448dde26a05c8e89ea4a678616f3e9d
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Sun Jun 20 02:05:12 2021 +0200

    Make the redirects Moved Permanently

 _redirects | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/_redirects b/_redirects
index 21bdad9..8de06e4 100644
--- a/_redirects
+++ b/_redirects
@@ -1,7 +1,7 @@
 # https://docs.gitlab.com/ee/user/project/pages/redirects.html
-/?go=contact /contact/
-/?go=contributing /contributing/
-/?go=donators /donators/
-/?go=download /download/
-/?go=showcase /showcase/
-/?go=tour /tour/
+/?go=contact /contact/ 301
+/?go=contributing /contributing/ 301
+/?go=donators /donators/ 301
+/?go=download /download/ 301
+/?go=showcase /showcase/ 301
+/?go=tour /tour/ 301