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/drone/secret.age

@@ -1,9 +1,7 @@
 age-encryption.org/v1
--> ssh-ed25519 cKojmg 1+cLlzctgcM0FnVDwMPOAqBkvMcDBRg8SvCw4djI93Y
-oV2XI4f1AvM9P591kZZ6NgJXa+SDtqGzCSgc4psOmxM
--> ssh-ed25519 jPowng Ufjfh1p350XxRPg95+/DHdmnl4lC0bbzUUlaxd1Bmxc
-/RHwFDSn2ov+60r1uHUigrsn99+GmmKmlk4h4T2gbA0
--> *Lc$@-grease
-pzVJAHy1qRq3jUrnFV0DDO7/hwV1US4Ogf0RsrVfX0xzbr73uJ003YjieVB25LqN
---- ME7/iVevyiguyhXugbkVFGzJV0yDccyKNlWbEZa/FmY
-YžŠXjb2uþnd;i0íýX]…§é0–þjé’L„PÔT~óú ƒÙ^kc”$D×ÚÛr¹úu³¶fr€e¸OÕ¸þ<C2B8>+p•¨<E280A2><C2A8>&ãw®öϨ
+-> ssh-ed25519 cKojmg 0J8FMcVRf78LYG+dTOFzu3luXwhOjdOg0sx4Jxdccj4
+tdrCcfcYbTZYhL18RG3goiqtyhu3NTn+fJhdIAnU5uA
+-> ssh-ed25519 jPowng qlF8nkSEg5fZgai0VP5eTSlZOHyj5IcalTf+QNWITVo
+O5aiZX0AJD76ixsu6i9xnnFBQANdsu3h6XzdTQ6KtKU
+--- ByMQt9bnbzd8YO0Y93FIYF/lmdbYcOydkYdKxpRQujM
++堍6JNm裶遁[Eb1p)vD究侖PL9捦€z逡<7A>煸!縺贿噮'嘥閍顖卷赿5︰:[控d肯峈撟M抪庱zj<7A>