Update maintainership (#360)

DESCRIPTION

@@ -3,13 +3,13 @@ Package: gradethis
 Title: Automated Feedback for Student Exercises in 'learnr' Tutorials
 Version: 0.2.14
 Authors@R: c(
-    person("Garrick", "Aden-Buie", , "garrick@posit.co", role = "aut",
+    person("Garrick", "Aden-Buie", , "garrick@posit.co", role = c("aut", "cre"),
            comment = c(ORCID = "0000-0002-7111-0077")),
     person("Daniel", "Chen", , "daniel.chen@posit.co", role = "aut",
            comment = c(ORCID = "0000-0003-3857-1741")),
     person("Garrett", "Grolemund", , "garrett@posit.co", role = c("ccp", "aut"),
            comment = c(ORCID = "0000-0002-7765-6011")),
-    person("Alexander", "Rossell Hayes", , "alex.rossellhayes@posit.co", role = c("aut", "cre"),
+    person("Alexander", "Rossell Hayes", , "alex.rossellhayes@posit.co", role = "aut",
            comment = c(ORCID = "0000-0001-9412-0457")),
     person("Barret", "Schloerke", , "barret@posit.co", role = "aut",
            comment = c(ORCID = "0000-0001-9986-114X")),
@@ -48,9 +48,9 @@ Suggests:
     rmarkdown,
     spelling,
     testthat (>= 3.0.0)
-VignetteBuilder: 
+VignetteBuilder:
     knitr
-Remotes: 
+Remotes:
     rstudio/ggcheck,
     rstudio/learnr
 Config/Needs/connect: rsconnect