Credits: move myself to Programming, add Sean Yeh, update Astrid

* Move myself to the programming section
* Add Sean Yeh to the misc section
* Finish 287ec15c101b's update of Astrid's credits

[ci skip]

data/core/about.cfg

@@ -231,6 +231,9 @@
         name = "Soliton"
         comment = "bug fixes and various small features usually in multiplayer context"
     [/entry]
+    [entry]
+        name = "Steve Cotton (octalot)"
+    [/entry]
     [entry]
         name = "Steven Oxley (xonev)"
     [/entry]
@@ -1658,6 +1661,9 @@
         name = "Samuel Kim"
         comment = "2012 Google Code-in Students' Micro AI development"
     [/entry]
+    [entry]
+        name = "Sean Yeh"
+    [/entry]
     [entry]
         name = "Sebastian Goll (afran)"
     [/entry]
@@ -1692,9 +1698,6 @@
     [entry]
         name = "Stéphane Gimenez (gim)"
     [/entry]
-    [entry]
-        name = "Steve Cotton (octalot)"
-    [/entry]
     [entry]
         name = "Steven Panek (Espreon)"
         email = "Majora700_AT_gmail_DOT_com"

data/core/about_i18n.cfg

@@ -354,7 +354,7 @@ sort=yes
         name = "Arne Deprez"
     [/entry]
     [entry]
-        name = "Bär Halberkamp (bumbadadabum)"
+        name = "Astrid Halberkamp"
     [/entry]
     [entry]
         name = "Floris Kint (Grimling)"