hosts: nixos: porthos: secrets: rekey secrets

Some of the secrets were using an invalid format due to (probably?)
being encrypted with a beta version of `age`.

I didn't need to rekey *all* the secrets, but I might as well

hosts/nixos/porthos/secrets/wireguard/private-key.age

@@ -1,10 +1,8 @@
 age-encryption.org/v1
--> ssh-ed25519 cKojmg +WwRpd2MzycutQFXyLsr2+GzSgF67Z6UuvyqYZaLd3w
-sppt8HzaZP3yxnvnhzjl18Trnz8g3VyXJ6CaVBWd7jA
--> ssh-ed25519 jPowng wanoqGB7T8bim/WZ4IAYViFQoGzaIZSgeoTr3YKpeTY
-ihDAdGa1XVW/qQz40V1v7a7iK7tu0EHMa7ayIogpcRw
--> l-grease |PIcZ NIr >0;*
-4o8o0bevQZ6uDSx1WxxlDCURbFCM+yK1XPdrb9aztCSvG2a+ne78E42l5rBcoH7I
-m51A8uWS4nSj36N/76v6K4kelxKzWUg
---- O6cGbTAVbDcdmPHf7UzfZiyiRtu1yfL4sBI+CkJA1qw
-ý
qýŐ$ň`żw'čS“X¸]Ąá÷ř®úî…?¤6‹Đ/ĆN(Bžň N«a”.˙ HŽ7żí•I<E280A2>ú÷Ŕoz‡/4:sK",7J
+-> ssh-ed25519 cKojmg KslHl4v8yCsKZn5TduLgpTfpTi1uOInC9N2e8Ow83FI
+NzcJJr8kw1ykAdWRZOeWdNhx0BTgE7FwTKcge+yLJ/w
+-> ssh-ed25519 jPowng YGWcOai0A9l2HDZyV0GtD8kEbY/xTUssODFBcseWAkA
+nJaHXkipFSHdyektoKV5y1jQrjkvnU7pwZwAymiQm7M
+--- IgWkDulol1jRa+pcx7DbEy5pvC+2nrRJHsdQVPvPur0
+Bb<ÅŒb!ÏëE?:ÇÓô=÷srJC<4A>œüKz5ø®Ô{–Æ4`¾&N0€ÕÈö¹57ñüví’©+´1
++(d§á¡{ìQŠÙ