bump roxygen2 version

DESCRIPTION

@@ -52,7 +52,7 @@ Roxygen: list(markdown = TRUE, roclets = c( "rd", "namespace", "collate",
     if (rlang::is_installed("pkgapi")) "pkgapi::api_roclet" else {
     warning("Please install r-lib/pkgapi to make sure the file API is kept
     up to date"); NULL}))
-RoxygenNote: 7.3.0
+RoxygenNote: 7.3.1
 Config/testthat/edition: 3
 Config/testthat/parallel: true
 Collate: