[gnome-system-monitor] Add me to AUTHORS file and credits tab of About dialog

[Robert Roth <robertroth src gnome org>]

commit e5c77049ecb1fb99534834d0216cd43ffc7e0a76
Author: Jacob Barkdull <jacobbarkdull gmail com>
Date:   Fri Sep 24 07:17:17 2021 +0000

    Add me to AUTHORS file and credits tab of About dialog

 AUTHORS           | 1 +
 src/interface.cpp | 1 +
 2 files changed, 2 insertions(+)
---
diff --git a/AUTHORS b/AUTHORS
index 801f3274..032b1cdb 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -6,3 +6,4 @@ Paolo Borelli <pborelli katamail com>
 Baptiste Mille-Mathias - artwork
 Karl Lattimer <karl qdh org uk>
 Robert Roth <robert roth off gmail com> - maintainer
+Jacob Barkdull <jacobbarkdull gmail com>
diff --git a/src/interface.cpp b/src/interface.cpp
index 65e52682..aa900890 100644
--- a/src/interface.cpp
+++ b/src/interface.cpp
@@ -393,6 +393,7 @@ on_activate_about (GSimpleAction *, GVariant *, gpointer data)
         "Chris Kühl",
         "Robert Roth",
         "Stefano Facchini",
+        "Jacob Barkdull",
         NULL
     };