Add redirect for archlinux-keyring migrated tasks[1]

We do not have a static copy of the migrated tasks, so a redirect is
better than a 404 page.

[1] infrastructure@4ff77e45
[2] archlinux-keyring#9

_redirects

+# archlinux-keyring
+/task/56061 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/17 302
+/task/68501 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/18 302
+/task/37122 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/19 302
+/task/37123 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/20 302
+/task/37124 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/21 302
+/task/37125 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/22 302
+/task/37126 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/23 302
+/task/37127 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/24 302
+/task/37128 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/25 302
+/task/37129 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/26 302
+/task/38209 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/27 302
+/task/41524 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/28 302
+/task/41536 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/29 302
+/task/52337 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/30 302
+/task/52338 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/31 302
+/task/52766 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/32 302
+/task/55623 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/33 302
+/task/55624 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/34 302
+/task/55977 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/35 302
+/task/55978 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/36 302
+/task/55979 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/37 302
+/task/56016 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/38 302
+/task/57132 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/39 302
+/task/57133 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/40 302
+/task/58504 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/41 302
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+/task/60305 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/45 302
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+/task/64099 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/48 302
+/task/64100 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/49 302
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+/task/67803 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/53 302
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+/task/68700 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/55 302
+/task/69078 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/56 302
+/task/37121 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/57 302
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+/task/38253 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/59 302
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+/task/41540 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/61 302
+/task/41584 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/62 302
+/task/42728 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/63 302
+/task/43443 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/64 302
+/task/43451 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/65 302
+/task/44591 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/66 302
+/task/44688 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/67 302
+/task/46710 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/68 302
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+/task/53132 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/75 302
+/task/54158 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/76 302
+/task/55074 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/77 302
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+/task/55660 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/79 302
+/task/55726 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/80 302
+/task/56212 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/81 302
+/task/56513 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/82 302
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+/task/48082 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/109 302
+/task/59872 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/110 302
+/task/63453 https://gitlab.archlinux.org/archlinux/archlinux-keyring/issues/111 302