Added support for SteamOS

ascii/distro/steamos

+"\
+${c2}              .,,,,.
+        .,'onNMMMMMNNnn',.
+     .'oNMANKMMMMMMMMMMMNNn'.
+   .'ANMMMMMMMXKNNWWWPFFWNNMNn.
+  ;NNMMMMMMMMMMNWW'' ,.., 'WMMM,
+ ;NMMMMV+##+VNWWW' .+;'':+, 'WMW,
+,VNNWP+${c1}######${c2}+WW,  ${c1}+:    ${c2}:+, +MMM,
+'${c1}+#############,   +.    ,+' ${c2}+NMMM
+${c1}  '*#########*'     '*,,*' ${c2}.+NMMMM.
+${c1}     \`'*###*'          ,.,;###${c2}+WNM,
+${c1}         .,;;,      .;##########${c2}+W
+${c1},',.         ';  ,+##############'
+ '###+. :,. .,; ,###############'
+  '####.. \`'' .,###############'
+    '#####+++################'
+      '*##################*'
+         ''*##########*''
+              ''''''
+"

neofetch

@@ -2060,7 +2060,7 @@ colors () {
             setcolors 7 4 1
         ;;
 
-        "Gentoo"* | "Funtoo"*)
+        "Gentoo"* | "Funtoo"* | "SteamOS"*)
             setcolors 7 5
         ;;