fix typo in variable name (#13)

Author: hsbasu

gnome-shell/src/data/gnome-shell-theme.gresource.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <gresources>
   <gresource prefix="/org/gnome/shell/theme">
-    @YARU_SHELL_THEME_RESOURCES@
+    @SUCHARU_SHELL_THEME_RESOURCES@
   </gresource>
 </gresources>