Change maintainer classification in the DESCRIPTION file

Co-authored-by: Maëlle Salmon <maelle.salmon@yahoo.se>

Author: ScientificProgrammer

DESCRIPTION

@@ -12,11 +12,11 @@ Description: Work with 'GitHub' 'gists' from 'R' (e.g.,
     <https://gist.github.com/>.
 Version: 0.9.0.93
 Authors@R: c(
-    person("Scott", "Chamberlain", , "myrmecocystus@gmail.com", role = c("aut", "cre"),
+    person("Scott", "Chamberlain", , "myrmecocystus@gmail.com", role = "aut",
            comment = c(ORCID = "0000-0003-1444-9135")),
     person("Ramnath", "Vaidyanathan", role = "aut"),
     person("Karthik", "Ram", role = "aut"),
-    person("Milgram", "Eric", role = "aut"),
+    person("Milgram", "Eric", role = c("aut", "cre")),
     person("Eric R.", "Scott", role = "ctb")
   )
 License: MIT + file LICENSE