bump argotk.

pkgs/argotk/pin.json

@@ -2,8 +2,8 @@
   "fetch": {
     "args": {
       "fetchSubmodules": false,
-      "rev": "09b37e853e296a2fdf7b550121093e4303f0cfb9",
-      "sha256": "17mj08afysgsf0p2qxxlndpgwr4gv7x6gy0jqa260bi7kpzxblqa",
+      "rev": "7e98c73ef3a2e522bc7845eedb186f73e9d3204e",
+      "sha256": "0cag994kymhhdd4jmyqz0rmia89ld0v7p3fjwj3kiw622wa01mfn",
       "url": "https://xgitlab.cels.anl.gov/argo/argotk.git"
     },
     "fn": "fetchgit"